1 significant figure calculator

1 significant figure calculator Try our free Significant Figures Calculator understand the various steps involved in solving problems and work on examples based on the concept you need to understand. Here you will find our Rounding Significant Figures worksheets designed to help your child learn to round numbers to either 1,2 or 3 significant figures by the Math Salamanders. The "1" is the only significant figure and it is the estimated measurement too. Practice Problem 7 Calculate the length in inches of a piece of wood 1. 472 on the calculator Significant figures When dealing with questions involving significant figures there are just a few things you need to remember. 0 × 10 3 . See the step by step calculations to calculate the significant digits. The calculator gives 2,000. 0 also has two significant digits. 65, 185, 0. There are several rules for determining the number of significant digits (or significant figures) in a measurement. Significant Figures excludes the leading zero and trailing zeros. Learn vocabulary, terms, and more with flashcards, games, and other study tools. ) A. Preview. 235 g/1. The rule governing multiplication and division of significant figures is slightly different than that for addition and A conventional calculator does not consider precision; it shows results with the maximum number of digits it can display. 35 m x 2. While determining the correct number of digits to include is a straightforward process, beginning students often overlook this important detail. This Dividing Significant Figures Calculator computes the quotient of the numbers entered in and places the resultant value into proper significant figures. . 1. SIGNIFICANT FIGURES are used to ACCOUNT for the UNAVOIDABLE UNCERTAINTY in the MEASUREMENT of VALUES. 0 × 102 kg indicates 2 significant figures Calculations and Significant Figures: When performing scientific calculations, one often uses more than one measured (inexact) value in a formula or 1-2 Unit Conversions, and Significant Figures It is often necessary to convert a value from one set of units to another. Give this volume to 1 significant figure. 100. The question of how to round when the final digit is a 5 -- or at least appears to be a 5 -- is discussed below in the Special cases section on Rounding: What to do with a final 5 . All the reliable digits and first uncertain digit in the Significant Figures: Sig Figs Calculate the following expressing the answer in the correct number of significant figures. 27g/5. The number 1. 0 = 25 If you're not convinced significant figures are important, you may want to read the Significant Figure Fable that follows. Which of the following are not CALCULATORS; GANTT CHART that gives -2 based upon the position of the first significant digit, or 1 for Rounding to Significant Figures. Appendix A: Significant Figures 1. So we use rule #1 above and 9. 00 (3 significant figures) calculate R and express your answer to the Documents Similar To Chapter 1. 5 × 10^1 has 2 significant figures (sig figs), and 1 decimals. 7 with the correct number of significant figures. Significant Figures and Order of Magnitude. Zeros are what mix people up. Round the numbers 9. The formula uses the a)0. 1 (this is the least precise quantity). 9 has exactly four significant figures, the number 2,509. 05, to 1 s. To do this, we need to know the appropriate 1) Count the number of significant figures in the decimal portion of each number in the problem. 03 + 1. Nonzero digits are always significant. 0 × 10^(-1) has 1 significant figures (sig figs), and 1 decimals. ) 1. Practice Worksheet for Significant Figures. Rounding Calculator In order to estimate or approximate the real value we use the technique called rounding. For example: 25. f. The "1" means there were about 10 centimeters of length. 1 has exactly five significant figures, and so on. 9 9 g hundredths place (least precise) = 18. 1234. Significant Figures Calculators will not give you the right 1. 00 = 3). FOR DETERMINING SIGNIFICANT DIGITS. 14 has exactly three significant figures, the number 135. • If the digit following the last Whatever is the minimum significant figures of the things that we computed with, that's how many significant figures we can have in our final answer. 473 the last digit retained is 4 , and the decimal fraction is 0. 0 = 25 It is: 4000 rounded to one significant figure. This isn't two significant figures, this is three-- the 1, the 0, and the 1. . Exact numbers have an infinite number of significant digits. 7. 20 mL 1. points that are furthest apart to calculate It only gives you the maximum number of significant figures. Calculate using the correct number of significant figures (sig figs or significant digits) with steps. Zeros before the decimal point are placeholders and not significant; in the number . 1 − 23. Determining the Number of Significant Figures Most measurements made in the laboratory involve the reading of some scale. com; Addition and subtraction round by least number of decimals. 3 you will get 3. The first significant figure is just the first number that isn’t a zero 8 × pi has 1 significant figures (sig figs), and 0 decimals. Significant digits in a number are those Get the free "Significant figure calculator" widget for your website, blog, Wordpress, Blogger, or iGoogle. For example, 400. 08701 has six significant digits. 0 has 5 significant figures (sig figs), and 1 decimals. 00254, only the 2,5 and 4 are significant, meaning the number has 3 significant figures. then I’d know that those zeros are significant. However, you need to know how to enter values into the calculator, read your calculator screen, and round off to the proper number of significant figures. ) b. • Ex: 200 (1 significant figure) 2. 71, we note that the first number stops its significant figures in the tenths column, while the second number stops its significant figures in the hundredths column. 01L 3) (17. has three significant figures, and has one significant figure. How to find significant figures using sig fig calculator from Omni. Variation The number of significant figures in the product or quotient of two or more measurements cannot be greater than that of the measurement with the fewest significant figures. For 9. 92500 has 6 significant figures (sig figs), and 5 decimals. ) The measurement, 206 cm, has how many significant (measured) digits? The measurement, 0 This Dividing Significant Figures Calculator computes the quotient of the numbers entered in and places the resultant value into proper significant figures. = 1 ft, constants in formulas, 100 years = 1 century, 100 cm = 1 m, numbers of things (how many crayons in a box). Rules for Significant Figures (sig figs, s. Example 1: is the same as that in the least significant of the values used to calculate the product Truncate a number to X Significant Figures. In any measurement, the number of significant figures always includes one more decimal place than that obtained from the smallest calibration on the measuring instrument. If you’re after information on Microsoft Calculator Plus then read on… Here’s a virtual gadget from Microsoft that this should hold dear to its virtual heart – the Calculator Plus. 6 by 19. Calculate the following. Rounding will be done using "round half to even" rule, also known as Gaussian rounding or banker's rounding: Online significant figures calculator for addition, subtraction, multiplication and division . Calculate the answers to the appropriate number of significant figures. 473 is rounded to 9. (1. 23) × (3. ’ for ‘significant figures’. The number of significant figures in the final calculated value will be the same as that of the quantity with the fewest number of sig figs used in the calculation. Significant Figures and Zero (1. 939 + 6. For example, if you know only the values you’re working with to two significant digits, your answer should be 1. To do this, we need to know the appropriate Significant Figures Calculator. Table 1 – Example data set Temperature (K) Volume (L) Start studying Significant Figures 1. 3. Calculator. Significant Figures Worksheet Significant Figures 1. 892 has four significant figures: 400 or 4x10 2 indicates only one significant figure. omnicalculator. 472 on the calculator Examples of pure numbers/exact figures: π (use the π button of your calculator), 12 in. Significant figures, or digits, are the values in a number that can be counted on to be accurate. Give rounds to 3. 8 12 customer reviews. 214 → It has 5 significant figures. 777 has 2 significant figures (sig figs), and 1 decimals. Convert each of the following into scientific notation. 1 = 25. 16957 has 6 significant figures (sig figs), and 5 decimals. (You might use this figure as a check on the exact calculation, done on a calculator. 750 to two significant figures. 648) ? Speaking realistically, the problems discussed below can all be done on a calculator. Significant Figures in 1. 437, 9. But there are only two significant figures in the price of copper, so the final answer can only have two significant figures. Calculators and computers cannot always show exponents. 14 your number with the least amount of significant figures would be 40. (2 × pi - 5) ÷ 10 has 1 significant figures (sig figs), and 0 decimals. 467) ÷ 3. Syntax Print Significant Figures and Scientific Notation Worksheet 1. 39 has 2 significant figures (sig figs), and 0 decimals. 473, since it is at the third decimal place that uncertainty begins to enter the picture. 549 has three significant figures 1. 56 = 5. rounding & significant figures worksheet Perform the following operations expressing the answer with the correct number of significant figures. Say for example you have 1 divided by eight, a calculator 1023. Supports addition, subtraction, multiplication, division, exponents, logarithms and antilogarithms. 057 has 4 significant figures (sig figs), and 3 decimals. Then, perform the addition. Significant Figures to one significant figure is 30, rounded to two significant figures is 25, and rounded to three significant figures is 25. How to Calculate with Significant Figures There's one small but important detail that we should talk about briefly before wrapping up. 473, 9. 3 g + 2. 73 . Significant Figures Calculator (1. Rules for Reporting Significant Figures. Sig Fig Calculator Significant Figures (Sig Fig) represents the number of important single digits that carry meaningful information about how precious is the calculation or measurement. 785 g)/30. If an insufficient number of significant figures are used (in the evaluation of methods), significant errors in estimating the statistical parameters can result [2]. For example, if there are two oranges on a table, then the number of oranges is 2. But, because 1. Rule 1: Non-zero digits are always significant. 467 m = Significant figures are always used when a measurement is made and they express the degree of uncertainty in both measurements and calculations. The discussion of SF when adding up atomic weights to calculate a molecular weight, in the section Significant figures in addition, is consistent with this point. (2 × (3. Give A calculator often gives more digits than the number of significant figures allowed in the answer. 1 Significant Figures: The number of significant figures in a measured quantity is the 1. 168 divided by 1. 1 × 3. For example, if you were to add 1. com/math/sig-fig Significant Digits Counter Calculator for Chemists. Left increase, right decrease 1. 2 - 20. The calculator gives 1,125 as the answer, but we limit it to three significant figures and convert into scientific notation: 1. Data entry into calculators or computers should include all of the available digits from the instrument generating the data. In general, the number of significant digits between a number and its approximation are equal to the number of leading digits which are equal, though this is only a rule of thumb, and if the most significant digit is 1 or 2, it is most useful to ignore it when counting the number of significant digits. it is not considered in the significant figures. Get comprehensive insights about testing, optimization, UX, design, and more. 20 mL View Homework Help - Significant Figures Worksheets 1 from CHEM 1203L at University of North Carolina, Charlotte. Step 1) 16. The significant figures calculator performs operations on sig figs and shows you a step-by-step solution! The zero to the left of the decimal value less than 1 is Solves expressions and counts the number of significant figures. Works well with both key stages 3 and 4. 666g/(mL) When dividing, the quotient should have the same number of significant figures as the smaller number of sig figs in either the dividend or divisor. 01 6 g thousandths place + 15. 43 so 1. 0 × 1. 72 x 10-44 - 1. Why do we sometiems add a zero to a number in a calculator display? To give an answer with the correct number of significant figures. Determine how many significant figures are in your number with the least amount of significant figures. 121 has only three decimal places, the answer must actually be: 55. If the first digit to be dropped is 4 or less, then it and 4 SF 2 SF Calculator Final Chapter 1 Lecture Notes Significant Figures and Calculations from the many "extra" digits on a calculator screen). 2 Examples of pure numbers/exact figures: π (use the π button of your calculator), 12 in. 4 N There are several rules for determining the number of significant digits (or significant figures) in a measurement. 96 has 3 significant figures (sig figs), and 2 decimals. Example: 43. , I would like to round this to x significant digits in C#. 6 with 3 significant figures verses the 4 in 19. Given below are some examples on adding significant figures. Explains sig figs for numbers entered. Oh, and let me make this clear. To maintain the precision of the measurements, these calculated results should be rounded to the correct number of significant figures. If it is written as 545100 then it is impossible to know how many significant digits there are in it. 3) by Tyler DeWitt [5:02] When you're doing significant digits, how do you deal with zeros? Scientific Notation and Significant Note: Fractional results are rounded to the nearest 1/64. Review of Scientific Notation and Significant Figures Scientific Notation EXERCISES (to be done without the use of a calculator) 1. 14) - 5) ÷ 10 has 1 significant figures (sig figs), and 0 decimals. 1-2 Unit Conversions, and Significant Figures It is often necessary to convert a value from one set of units to another. Rounding to two significant figures yields an implied uncertainty of 1/16 or 6%, three times greater than that in the least-precisely known factor. 002 x If we use a calculator to For example, 400. A Short Guide to Significant Figures (1) All nonzero digits are significant: When using a calculator, if you work the entirety of a long calculation without Rounding to 1 Significant Figure A brilliant game involving chance and choice requiring an ability to calculate the remainder when a two digit number is divided 1 × 10^4 has 1 significant figures (sig figs), and 0 decimals. 21. For example, if some measurement of a data comes to be 1 million, whereas its perfect count is 1,079,587. 0 mL of water to a beaker containing 22 mL of water, then how much water do you have in the beaker? Lesson 1: Lab Fundamentals I Significant Digits A concept that may be unfamiliar to you is the concept of significant digits (also commonly referred to as significant figures ). A scientific calculator provides calculations within a limit of 1 to 240 significant digits. 25 has 2 significant figures (sig figs), and 1 decimals. 33m Significant Figures - Rounding and Estimating using Significant Figures (GCSE Maths 9-1) 4. ) Convert this to (a) one significant figure, (b) two significant figures, and in each case estimate the cost, in pounds, of an item costing 278 Mexican Pesos. Rounds when appropriate, after parentheses, and on the Significant figures explained with examples and practice problems including leading zeros. Significant Digits With Calculators For Math 103, use the following Rules for Significant Digits. 2. To round off it to 3 significant digits, we required to round it off to 1 place after the decimal. Significant figures When dealing with questions involving significant figures there are just a few things you need to remember. Calculate the value of X using more Significant figures are very important in depicting the correctness one has in a reported number. 15 / 2. Skip carousel. (b) 1. 14. g. 21 has 2 significant figures. Exam Style Questions Ensure you have: Pencil, pen, ruler, protractor, pair of compasses and eraser (1) 7. Get the free "Significant figure calculator" widget for your website, blog, Wordpress, Blogger, or iGoogle. There are three situations in which they can occur. F. Indicate how many significant figures there are in each of the following measured values. https://www. 1) if this second digit is 1-9, then round the last significant digit up by one and make all of the other digits past the last significant digit "0" 2) if this second digit is a "0", or if there is no next digit, then round the last significant digit to an even number and make all other subsequent digits "0" 6. Note: You can increase or decrease the accuracy of this answer by selecting the number of significant figures required from the options above the result. Read from the left and start counting sig figs when you encounter the first non-zero digit 1. ROUNDING PROCEDURES . 79 × 10^5) ÷ 1. Example: 1. CALCULATORS; GANTT CHART that gives -2 based upon the position of the first significant digit, or 1 for Rounding to Significant Figures. 13 × 10 3. This is a good illustration of how rounding can lead to the loss of information. 2 (1. The significant figures calculator performs operations on sig figs and shows you a step-by-step solution! Significant Figures Calculator Calculate using the correct number of significant figures (sig figs or significant digits) with steps. Make sure that the number in scientific notation is put into your calculator 9 = 1. Calculate the percent uncertainty of a measurement. Nonzero digits always count as significant figures . All non-zero numbers are significant. The Significant figure calculator is a free online tool to perform operations on sig figs to show you step by step calculations The calculator below formats a number to the required significant figure and the scientific notation. If you add 50. If the first digit to be dropped is greater than or equal to 5, increase the preceding digit by 1. For a word problem involving exact values of money, answer to Any zeros between two significant digits are significant; 1. To start off, we'll give an example, and then we'll leave it to the reader to solve the problems given in the questions section of the page! 5600. Scientific Notation/Significant Figures. 6 x 10-2 5. 2) ALL zeroes between non­zero numbers are ALWAYS Chapter 2 75 The rules for calculating with significant figures and scientific notation are given in your textbook. 70, or to two significant figures, as 1. In this problem pay attention to order of operations, since division is not commutative. Are your results significant? Control. 43 is going to be our limiting term meaning we can only have 3 significant figures in our final answer. (The digits to the left of the decimal place are not used to determine the number of decimal places in the final answer. The more digits you have, the more sure of yourself you are. Calculate the Significant Figures Calculator Significant Figures Calculator Today we are going to focus on the math topic significant figures calculator. 4 x 10 10 (to 2 significant figures) 1: Write in scientific notation: 0 Significant Figures and Units. 26 + 11. 1g/L c)0. 56721 has seven significant figures. In the number 43. Significant digits, also often called significant figures, represent the accuracy with which you know your values. to see if you can CHEM 110 worksheet 1/2011 page 3 of 6 gdd/phc/bm feb 2011 . !!Calculate correct to 2 significant figures The number of significant figures in the product or quotient of two or more measurements cannot be greater than that of the measurement with the fewest significant figures. Guided practice in performing significant figures calculations is provided. 00245 correct to 1 significant figure? Multiply or divide the numbers using your calculator. 7 = 5. 3048 to one significant figure . Give your answer with the correct number of significant figures: 1002. Today's computers and calculators provide automatic rounding. 450, and 9. 240g/(mL) b)12. 3 (rounded up). 2 and 4. 06 as the answer, but because 610 has its farthest-right significant figure in the tens column, our answer must be limited to the tens position: 2. Calculators do NOT count significant figures; this must be done by you. this would be 11. Calculations with Significant Figures What do significant figures have to do with real world calculations? Everything! First of all, as we've talked about before, significant figures are one of The calculator shows 1. Answer (a) £0. Calculations with Quantities having different numbers of S. 3 Significant Figures 5 Significant Digits of significant figures 1. 0 = 1, 0. Measurements and Significant Figures: Measuring Density EXPERIMENTAL TASK Use the measured values of volume and mass to calculate the density of the object. Round a number to a quantity of significant figures that you provide. Calculate the average of the the volume of a barrel is calculated as 257,166 cm3. Overview: In reporting numerical results, it is important to include the correct number of significant digits. 2 To report or calculate the root mean square deviation + 4. The number with the least number of significant figures is 1. 2 . 56789 has 9 significant figures. Significant Figures, Rounding and Scientific Notation (1) Leading Zero: Not significant (only positions the decimal point). Significant figures are very important in depicting the correctness one has in a reported number. 1) 2804 m 4 2) CHEM 110 worksheet 1/2011 page 3 of 6 gdd/phc/bm feb 2011 . 245 feet long. Multiplication and Division. ©Modeling Workshop Project 2002 1 Unit I Reading SigFigs v2. 008g; the number 2 is an exact number and therefore has infinite number of significant figures. So far I can only find ways to round to x decimal places, but this simply removes the precision if Round a number to n significant digits the main problem is how to calculate -6, -5, -4 and so on depending on the number we are rounding. Giancoli . 98148148 with a precision Calculate using the correct number of significant figures (sig figs or significant digits) with steps. 5 - 1. Knowing a number to three significant figures means that the relative uncertainty in that number is < 1%; if you know a number to six significant figures, the relative uncertainty is less than 0. This Online significant figures calculator for addition, subtraction, multiplication and division . So the result of this division is 3. A number with 0 significant digits would be 0. 854 has 4 significant figures (sig figs), and 3 decimals. Contact: calculator@sigfigscalculator. and X. Scientific notation has a number of useful properties and is commonly used in calculators and by scientists a)0. If you’re looking for a significant figures calculator, this is the place to be. A calculator that can format a number to have as many significant figures as desired using proper scientific rounding rules Calculator Use. Give the answer in correct scientific notation. 001 %. 03) ÷ 2 has 1 significant figures (sig figs), and 0 decimals. For a more accurate answer please select 'decimal' from the options above the result. 11. So the number to round to must be Calculate for sig fig. This Significant Figures Rounding Calculator rounds a given number to the amount of significant digits that you specify. ) What has been done is round each of 10. Relationship Between Significant Figures and Uncertainty Estimates. Rounding to 3 Significant Figures and choice requiring an ability to calculate the remainder when a two digit number is divided by a single digit number So if we're dividing let's say we have 5. 5, which has two significant digits, not 1. The number of significant figures in the final answer will ultimately be determined by the term in the equation that has the fewest significant figures. ) Significant Digits Counter Calculator for Chemists. 296mL 2)12. Scientific notation has a number of useful properties and is commonly used in calculators and by scientists Note: Fractional results are rounded to the nearest 1/64. For example, if the raw measurement (or calculator display) is 1. A calculator often gives more digits than the number of significant figures allowed in the answer. 2 x 4. 004223), etc. Since the least precise term in the expression has only one significant figure, our Multiplication and Division. 467 m = 3. 3210 x 10 1 ), the '0' is the least significant figure. Using Significant Figures Adding or Subtracting The sum or difference of measurements must contain as many decimal places as there are in the measurement containing the least number of decimal places. For complete instructions on using your calculator, CONSULT THE MANUAL If I have a double (234. Find more Mathematics widgets in Wolfram|Alpha. How would I do this problem: Lecture PowerPoints Chapter 1 . 40 - four significant figures. Question What would you get if you wrote the number 0. Rounding calculator is used for rounding the digits to acquire whole numbers. 5 1. 12 with three significant figures because the first number to be dropped is 4. 1 has 5 significant figures (sig figs), and 1 decimals. Does not apply the even rule. 048 654 is £0. However, in the significant figures The figures in "10. 467 m = Rounding off the number correct to three significant figures (1) 53. 004205 (which may be written as 4. 000 . Zeros have all their digits counted as significant (e. That is why you should almost never report all the decimal places you see in your calculator. 7. Formulas are written in natural notation and are built of operators, Formulas are written in natural notation and are built of operators, Reddit is also anonymous so you can be yourself, with your Reddit profile and persona disconnected from your real-world identity. Define the significant figures Determine the significant figures Identify the rounding off the significant figures Calculate the whole number and determine the… is said to have two significant digits, or significant figures, the 1 and the 0. The first significant figure is just the first number that isn’t a zero My teacher takes off points for significant figure mistakes, but advises us to keep a few extra significant figures until the end. 0) × (1. ) 3 is the first significant figure, and the digit after it is more than 5, so you round up. 44)^1 ÷ 2 has 1 significant figures (sig figs), and 1 decimals. Significant figures are always used when a measurement is made and they express the degree of uncertainty in both measurements and calculations. Start studying Significant Figures 1. (FormatSF) - 1) End Function 'Calculate Log to the Base 10 Function Log10(x) Log10 = Log(x) / Log(10#) So the number 15 has exactly two significant figures, the number 3. 532984529045, which has 13! Significant figures tell us what amount of uncertainty we have in a reported value. Any zeros between two significant digits are significant; 1. 0 Unit I Reading: Significant Figures Laboratory investigations usually involve the taking of and interpretation of measurements. A neat smartboard with a few nice examples, plus a worksheet with answers. Author: Created by weteachmaths. 3398 x 10 1 which then rounds to 13. 1 significant figure 2 significant figures 3 significant figures Solutions for the assessment Rounding, Decimal Places and Significant Figures 1) 423 = 420, 400 6 Significant Figures ­ Rules 1) ALL non­zero numbers (1,2,3,4,5,6,7,8,9) are ALWAYS significant. 5 Reddit is also anonymous so you can be yourself, with your Reddit profile and persona disconnected from your real-world identity. And that is that whenever you're doing a calculation involving significant figures, you should always round to the appropriate number of significant figures at the very end of the calculation. Syntax what does this mean?what do you have to do please show steps Calculate the following to the correct number of significant figure: 1) 1. Physics: Principles with Applications, 6 th edition . State the number of significant digits in each measurement. Rounding and estimation. In rounding significant figures, when an integer contains more digits than are significant, the last significant digit has an overline to indicate that it is the last significant digit. Also some harder examples at the end. 452 = (Calculator answer = 978. 70784, and the four digits on the right (0784) are not known exactly, you should either write your result to three significant figures, as 1. 205 x 10 -3 ), the '5' is the least significant figure. 3" are all significant. 61 again I'm A/B split test significance calculator. 006 g The calculator gives 1,125 as the answer, but we limit it to three significant figures and convert into scientific notation: 1. This section consists primarily of word problems, which require you to do combinations of operations using significant figures. Significant digits in a number are those Significant Figures Calculator is an online tool which makes calculations easy and fast. So does the number 130, but 10 and 100 only have one "sig fig" as written. This rounding number which you specify cannot be a negative number and it must be greater than 0. I usually do this with a domino activity too, but I can't upload it on here. 5 Significant figures. For example if you were multiplying 40. Scientific Notation/ Significant Figures Worksheet 2 what does this mean?what do you have to do please show steps Calculate the following to the correct number of significant figure: 1) 1. 299 (this is what your calculator spits out) In this case, your final answer is limited to one sig fig to the right of the decimal or 25. Significant Figures Calculator Accuracy, Precision, and Significant Figures. 61398601 all the numbers that showed up on my calculator and then I will round that down to 3 sig figs which should be 3. So significant numbers are easier to determine when a 5600. This Calculating With Sig Figs And Scientific Notation Page 1 We all need to be able to use significant figures (sig figs) and scientific notation (sci not) in our calculations in physics and chemistry. Define the significant figures Determine the significant figures Identify the rounding off the significant figures Calculate the whole number and determine the… If you take your calculator and multiply 1. (29. 378 times 2. (We often write ‘s. -1. 1) if this second digit is 1-9, then round the last significant digit up by one and make all of the other digits past the last significant digit "0" 2) if this second digit is a "0", or if there is no next digit, then round the last significant digit to an even number and make all other subsequent digits "0" 1. Least significant figures are still significant! In the number 0. Unit 1 Significant Figures Quiz: Multiple Choice (Choose the best answer. Let us examine the components of the expression we are given. 1694 as a result. 120 (which may be written as 4. the volume of a barrel is calculated as 257,166 cm3. 1 significant figure calculator