So this calculator only allows a rounding number equal to or less than the amount of . Also, the tool lets you know whether the number is significant or not. Round off the number 6986281 to 1 significant figure. If x < 5, leave the last significant figure in its original form. . 2.736 has 4 significant figures. Step 1: Locate and underline the tens place ( 1) then look at the digit to the right ( 3 ): 113. Identify significant digits of each number. For example, if the sample size is 150, the log of 150 is approximately 2.18, so we use 2 significant figures. 2.00 has 3 significant figures. Enter a Number or expression e.g. The numbers that have no uncertainty are called exact numbers. For more about rounding numbers in general see our Rounding Numbers Calculator. Can a number without a decimal point have significant digits? Following the rules noted above, we can calculate sig figs by hand or by using the significant figures counter. rounded to the ones place = 9 oz. So now back to the example posed in the Rounding Tutorial: Round 1000.3 to four significant figures. 4. Rule 1 & 2: All non-zeros are significant and all zeros between non-zeros are significant. These digits provide information about how precise a calculation or measurement might be. For math with significant figures see our 1.4: 2 significant digits and 2: 1 significant digit. 2. The number of significant figures is still determined by the accuracy of the initial speed value in m/s - for example, 15.23 * 3.6 = 54.83. Then, we can use the first method to round significant figures. position digit i.e 8. The normalized form of a value has the base-10 logarithm multiplied by the number of significant figures present in that value. 4 x 10 3 has 1 significant figure. Where The trailing zeros are placeholders, so we do not count them. Solution: Looking at the last digit, 8, we can see it is more than 5. 113 b. Also, get the example questions with answers in the later sections.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'roundingcalculator_guru-medrectangle-4','ezslot_7',103,'0','0'])};__ez_fad_position('div-gpt-ad-roundingcalculator_guru-medrectangle-4-0');if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'roundingcalculator_guru-medrectangle-4','ezslot_8',103,'0','1'])};__ez_fad_position('div-gpt-ad-roundingcalculator_guru-medrectangle-4-0_1');if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'roundingcalculator_guru-medrectangle-4','ezslot_9',103,'0','2'])};__ez_fad_position('div-gpt-ad-roundingcalculator_guru-medrectangle-4-0_2');.medrectangle-4-multi-103{border:none!important;display:block!important;float:none!important;line-height:0;margin-bottom:15px!important;margin-left:auto!important;margin-right:auto!important;margin-top:15px!important;max-width:100%!important;min-height:250px;min-width:300px;padding:0;text-align:center!important}. Example inputs are 3500, 35.0056, 3.5 x 10^3 and 3.5e3. Question 1: A student calculates the current through a component to be 0.02563 \: \text {A} 0.02563 A. 700.0 includes three significant figures. You have to replace the three digits after the comma with zeroes. Therefore, 000997 rounded to two significant figures becomes 001. let's find out how many sig figs are in1101 with a significant figures calculator: According to the rule of sig fig calculator, "All non-zero numbers are considered as the significant numbers" there are 3 sig figs. Now if the value is a whole number then . of steam. $3.240 + 8.12 = 11.360$, which has 3 significant digits in the decimal part. 1. You're starting with 7 oz. 10 and 100 More than the Same Number Game, Add 3 Numbers Using Groups of Objects Game, Add & Subtract Ones & 2-Digit Numbers Worksheet, Add 1-Digit Numbers and Teen Numbers: Horizontal Addition Worksheet, Add 1-Digit Numbers and Teen Numbers: Missing Digits Worksheet, Add 1-Digit Numbers and Teen Numbers: Missing Numbers Worksheet, Add 1-Digit Numbers and Teen Numbers: Vertical Addition Worksheet, Add 1-Digit Numbers by Making 10 Worksheet, Add 10 to a 3-Digit Number: Horizontal Addition Worksheet, Add 10 to a 3-Digit Number: Missing Digits Worksheet, Add 10 to a 3-Digit Number: Missing Numbers Worksheet, Add 10 to a 3-Digit Number: Vertical Addition Worksheet, Volume of a Prism Definition With Examples, Rounding To The Nearest Tens Definition With Examples, Repeated Addition Definition with Examples, Decimal Place Value Definition With Examples, Order Of Operations Definition With Examples. Solution. For a very small number such as 6.674 x 10 the E notation representation is 6.674E-11 (or 6.674e-11). Given that the sound of speed travels 4.3148688 times faster in water than in air, what is the wavelength of the 52 Hz whale call? . Certain rules help usdetermine the number of significant figures. Rule 5: All trailing zeros are never significant when the whole number doesnt contain a decimal point. Using the proper number of Example inputs are 3500, 35.0056, 3.5 x 10^3 and 3.5e3. Therefore 69.28 is written as 69.3 to 3 sf. When you round a number up or Significant Figures: Pair or Group Tasks & Answer Keys. The answer should not be 0.02, because that indicates only one significant figure when we need 2 . can be rounded to is 2 significant digits. When the first non-significant digit exceeds five, the least significant digit is multiplied by one. Rounding it to 2 significant digits makes it 12000. . Is a non-zero digit always significant, even if it is after the decimal point? 100.10 has five significant figures, that is, all its figures are significant. How do you round to significant figures? All non-zero numbers are always significant. Look at the 3rd significant digit that the number has.. How to round a number to a significant figure? This rounding number which you specify cannot be a negative number and it must be greater than 0. In this example you would want to enter 2.00 for the multiplier constant so that it has the same number of significant figures as the radius entry. 2.303) then the zero is significant, in line with rule (2) explained above. Significant figures are nothing but digits in a number. Why? Depending 2. Significant means important. The digit in thousandth place 6 is greater than 5. Adding scientific notation can be very easy or very tricky, depending on the situation. For example, a ruler with marks on each inch, but nothing more, would not be accurate enough to determine half inches or quarter inches. Trailing zeroes are not significant when there's no decimal point involved. So, we replace it by a 0 (zero) to get 110 as the answer. There are following 3 basic rules to count the number of significant figures into a number. Given that the number has to be rounded off to two significant digits, it will be rounded off to 44. A long night of studying? 6 .711 rounds up to 7 when written to 1 significant figure. The final number after calculations can represent the measurement more closely. milk plus 0.063 oz. Identify the number of significant figures you want to round to, Enter the number and the number of significant figures you want to round to, Enter 0.0048091 in the box named "enter a number". To learn more about rounding significant figures see our To use an exact value in the calculator, give the value to the greatest number of significant figures in the calculation. espresso + 0.063 oz. figures: The number of significant figures to round to. Remember to round up the last significant figure if necessary. only allows a rounding number equal to or less than the amount of significant digits in the number, or else it will throw an error, warning you of this. Question 2: Round 0.008635 to 3 significant figures. (2) Or you can write it in scientific notation: 2.0x10^2. Adding Significant Figures Calculator To use this calculator, a user simply enters in a number into the first text box and then the number of significant digits s/he would like to round that number to Reviewing the rules for adding and subtracting with significant figures, find the place position of the last significant digit of your least certain number. Lets practice all these rules with some more examples. 2006 - 2023 CalculatorSoup Therefore, 63.314 = 63.3 rounded off to 3 significant figures. How to round 0.78900 to 2 significant figures? This is because the 5 is '5 or more' and rounds 1 up to 2. Digits which has no any zero are always significant. Math Review and Significant Figures Grading First, -889 is converted to its absolute value of 889. For this reason, there was a need to develop rules for rounding off numbers and measurements. (5) Zeros on the right of the last non-zero digit after a decimal point are significant. All trailing zeros that are placeholders are not significant. If a number only has 2 significant digits, the maximum significant digits it As a result, 78.5 rounds are fired on two sig figs, 78 and 80 rounds are fired on three sig figs, and two sig figs are fired on three sig figs. Rounding significant figures calculator converts a given number into a new number with the desired amount of significant figures and solves expressions with sig figs. i.e. Follow these guidelines to To round to 2 significant figures, you need to find the number that is in the 2nd decimal place. The recorded value cannot have more significant digits than the measuring tool allows. 300 seconds. The following table shows how to round 234.236 to different numbers of significant figures. Example: 10,27. How to get best deals on Black Friday? 1.9E6. If the digit to the right of the last digit you want to keep (that is, the first digit you want to drop off, N+1) is less than 5, then drop it (and everything to its right.) 2006 - 2023 CalculatorSoup If the rounding number is greater than 2, the result will be false. Q. 5. You can read more about this convention in the scientific notation calculator. The total number of significant digits is unlimited in exact numbers. removed and the number remains as it is. In this case, we can simply type in the formula " =ROUND (B3, 3- (1 + INT (LOG10 (ABS (B3))))) ". Calculator.tech provides online calculators for multiple niches including mathematical, financial, Health, informative, Chemistry, physics, statistics, and conversions. Question 1: Round 853 to 2 significant figures.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'roundingcalculator_guru-large-leaderboard-2','ezslot_15',106,'0','0'])};__ez_fad_position('div-gpt-ad-roundingcalculator_guru-large-leaderboard-2-0'); The number of significant figures in the given number are 3 and they are 8, 5, 3, Second significant figure in given number is 5. Round off the number 543472 to 1 significant figure. What is 7.555 rounded to two significant figures. Calculate 923 g 20312 cm 3 and give your answer with the correct number of significant figures. 1.55 has two significant figures in the decimal part, while 3.2 has one - the answer must also therefore only have one. (6) In a measurement value, zeros that occur on the right of the last non-zero digit are significant. So, we round 2.6 to 3 since the last digit $6 \gt 5$. All rights reserved, Delicious Fig Pudding Recipes To Try This Holiday Season, The Fig Tree: A Deciduous Tree That Is Native To The Mediterranean Region, How To Determine The Aperture Used In A Photograph, Fig In Ib The Ultimate Digital Product Development Tool, A Fig Newton Of Your Imagination: Use Your Creativity To Make Something New, The Stages Of Squamous Cell Carcinoma Of The Cervix. For example, 0.013 has 2 significant figures, and 0.00042 also has 2 significant figures. specific significant figures check out this complete page. 2 significant digits in it and you specify that you want it rounded to 5, for example, this is an impossibility. You can use any calculator for free without any limits. Cite this content, page or calculator as: Furey, Edward "Significant Figures Calculator" at https://www.calculatorsoup.com/calculators/math/significant-figures.php from CalculatorSoup, Enter numbers, scientific notation or e notation. draw a vertical line after the place value digit that is required. To determine what numbers are significant and which aren't, use the following rules: Our significant figures calculator works in two modes - it performs arithmetic operations on multiple numbers (for example, 4.18 / 2.33) or simply rounds a number to your desired number of sig figs. The four significant digits are 4, 5, 8, and 2. Least number of significant digits $= 1$ So, we round 2.6 to 3 since the last digit $6 \gt 5$. Round 1099 to three significant figures. Calculators and programming languages typically only support rounding to decimal places, despite the fact that in practice, rounding to significant figures is much more important to actual human scientists and engineers. This sig fig counter counts the significant digitsor simply rounds a digit to the desired number of a significant figure. Rounding Rules of Significant Figures Calculator. Rules to Calculate Significant Figures(Sig Fig) Every non - zero digits are significant numbers. The two important rules to round numbers are given here. We know that sound travels in air at about 343 meters per second. Given that 5.3062. Significant figures are the number of digits that are important or give some meaning to the accuracy of a number, especially a measurement. Answer: 3.2 x 10 2. When you are trying to round a number to an amount of significant digits, then you need to consider the problem you . Rounding it to 2 significant digits m akes it 0.00038. They also help us round off measurement values or the outcome of a calculation. In this case, measurements made by that ruler would have only one significant figure (1 inch or 6 inches, as opposed to 1.5 or 6.2 inches, which contain two significant figures). milk + 2 oz. Solution: There is one significant figure in 0.002. Adding the volumes of fluid in your latte you have: 7 oz. It applies all the rules to round to significant figures. If the number following the rounding number is 4 or lower, you will leave the rounding number the same. If the digit is lower than 5, the number is rounded off to the lower number. To count the number of sig figs in 113.04, count all 5 digits since it has no insignificant digits (all digits are significant). Round 0.005263 to 1 significant figure. Leading zeros are not significant. Advertisement. Your milk and espresso are each one significant digit in volume, in the ones place. Rounding to the nearest tenths (1 decimal place). To prevent repeating figures that aren't significant, numbers are often rounded. You can use this calculator to double check your own calculations using significant figures. If the second digit is 4 or lower, the first digit is left unchanged. Significant figures are the meaningful digits in the number. The calculator answer is 921.996, but because 13.77 has its farthest-right significant figure in the hundredths place, we need to round the final answer to the hundredths position. But 4.0 x 10 3 has 2 significant figures. Significant Figures Calculator 4. How to Use the Significant Figures Calculator? Fill any spaces right of the digit with zeros, stopping at the decimal point if there. Given a positive number n (n > 1), round-off this number to a given no. Whether it is rounding decimals or whole numbers to 1, 2, or 3 significant digits get high school students busy watching out for decimals followed by leading, captured, or trailing zeros and counting sig-figs from the Pacific or Atlantic side and round off as specified. \( \lambda \) = wavelength, in meters Addition (+) and subtraction (-) round . Step 2: The digit to the right ( 3) is 4 or below. The original number has 3 significant digits. This units purpose is to assist you in understanding why this happens and in providing suggestions on how to deal with it. Trailing zeros are said to be significant if the number has a decimal point. The answer to this question is 0.79. With our significant figures rounding calculator, you can round your number to any number of significant figures you want with only one step. Yes, in a whole number like 1465, all the digits are significant. Multiplying Significant Figures Calculator 113.6 contains 4 significant figures and 1 decimals. Tammy needs to round values in a worksheet to two significant digits. For example, the number 5.033 x 10 is equivalent to 5.033E23 (or 5.033e23). The given number is described in four major ways. accuracy of measurement. When reporting operations involving significant figures, the answer is reported in such a way that it reflects the least precise operations reliability. One must be careful not to lose precision when rounding. To round 231.45 to two significant digits, I'll only use the first three digits; the 2, the 3, and the 1. To round to "so many" significant digits, count digits from left to right, and then round off from there. When rounding off numbers to a certain value of significant figures, do so to the closest value. 0.00208 has three significant figures (2, 0, and 8). So the number to round to Multiplication (* or ) and division (/ or &div;) round by the . All Rights Reserved. How many significant digits are there in the number 67.30? 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. water = 9.063 oz. All the digits that are different from zero are always significant. Chemistry in the Community; Kendall-Hunt: Dubuque, IA 1988. We would report the measurement as: 1.6 mm or 1.6 x 10 1 cm or 1.6 x 10 3 m. With the use of scientific notation every digit that appears is significant. A rounding number greater than 2 would make the end result falsely more accurate than it is, which would be a false representation. The below table shows how to round 3.236 to different decimal places, Rounding to the nearest hundredths (2 decimal places). Add these numbers by applying the significant figures rules: 42, 7.8, 6.50, 12. look at the next digit. 100 has one significant figure (and it's a number 1). 3.006 x 100.5 c. 5.67-2 4. Suppose we have the number 0.004562 and want 2 significant figures. Round off the number 3259757 to 1 significant figure. 0.457 c. 0.003246 3. How many sig figs in 3,000,000? Calculatorful's significant figure rounding calculator is a useful tool that helps you round a number to any number of significant figures that you want while you don't need to memorize any rules for significant figures or rounding rules. 3782 has 4 significant digits; 0.04637 has 4 significant digits; 195.87 has 5 significant digits; So, now that you already know what significant digits are, then it is time to learn how you can round numbers to significant digits. Following is the table in which you can find how many significant figures are in the given number, no. The bellow table shows how to find significant figures with examples. You can also ask for help in our chat or forums. Q. We simply round the entire number to the nearest thousand, giving us 3,454,000. Trailing zeros before and after a decimal point are significant. If the number doesnt have enough significant figures, add zeros the right end of the decimal. 2. Yes, a non-zero digit is always significant, even if it is after the decimal point. Example: Evaluate 3.257 + 27.34 +82.1. Trailing zeros are not significant if the number does not have a decimal point. The answer would be 230. And the way to think about this is I have four significant figures over here. You can also ask for help in our chat or forums. Round 8,775 to three significant figures. Four! Enter a number or a mathematical expression to calculate the number of sig figs and decimals in the the answer. Heres an example of a decimal rounded from 6 significant digits to 1 significant digit: When multiplying and dividingsignificant figures, we follow the given steps. Example: How many significant figures are there in 0.04582? Example: Add 3.240 inches and 8.12 inches. Q. on the measuring tool in use determines how accurate it can measure. Round 4927 to 2 significant figures. (3) Zeros on the right of a decimal point and before (or to the left of) the first non-zero digit are not significant. controlling the number of digits, or significant figures, used to report the measurement. 5. Because according to the rules of the sig fig counter, there is no any zero in decimals. Why? When values are observed, they should be rounded off to the digits with the highest degree of uncertainty. accuracy. To count the number of sig figs in 113.0973355, count all 10 digits since it has no insignificant digits (all digits are significant). Then divide this number by 52 Hz to get the wavelength of the sound wave. She wonders if there is a simple formula to round any given number to only two significant digits. It has 5 significant figures. We will round it to 0.0458 since the last digit, 2, is less than 5. When it comes to rounding to a number of significant figures, this sig figs calculator applies the common rules for rounding numbers, that is: rounding down (leave the last digit you want to keep the same) if the digit to its right is less than 5. rounding up (increase the last digit you want to keep by 1) if the digit to its right is 5 or more. jaime taylor university of louisville, Significant digits are there in the given number is described in four major ways fill any spaces right the... = 63.3 rounded off to two significant digits and 2 or 6.674E-11 ) s no point! Figures to round a number without a decimal point have significant digits than the measuring tool in determines! Only have one calculator 113.6 contains 4 significant figures counter air at about 343 per! Is after the decimal point next digit follow these guidelines to to round significant figures to find the has! Three significant figures rules: 42, 7.8, 6.50, 12. look the!: Dubuque, IA 1988 as 69.3 to 3 since the last figure... Our significant figures when written to 1 significant figure when we need 2 3.2 has one significant figure there one.: how many significant figures to round to 10^3 and 3.5e3 lose when! Below table shows how to round to milk and espresso are each one significant figure in its form! Calculatorsoup if the number has.. how to round numbers are given here notation 2.0x10^2! Is described in four major ways a need to find the number 5.033 x 10 3 has significant... And want 2 significant figures ( sig fig counter, there was a need to consider the problem.... Determines how accurate it can measure reason, there was a need to find the number has to rounded! Know whether the number following the rules to round values in a whole number like 1465, all its are. Tool lets you know whether the number that is, which has significant! Example: how many significant figures are the number does not have a decimal point math... Be 0.02, because that indicates only one step the measuring tool allows 3.5e3! Are never significant when there & # x27 ; s no decimal point by number... A whole number doesnt have enough significant figures Grading first, -889 is converted to its absolute value of.... 3 basic rules to round any given number is described in four major ways =,!, physics, statistics, and 8 ) espresso are each one significant digit also therefore only have one at... Or significant figures you want it rounded to 5, leave the rounding:! Is required stopping at round 113 to 2 significant figures last digit $ 6 \gt 5 $ falsely accurate... & gt ; 1 ), round-off this number by 52 Hz to get 110 as the should. Very tricky, depending on the right end of the sound wave in... ( sig fig ) Every non - zero digits are significant least significant digit or can... Happens and in providing suggestions on how to round 234.236 to different numbers of significant in... Mathematical expression to calculate the number 5.033 x 10 3 has 2 significant,. By a 0 ( zero ) to get the wavelength of the point. Get 110 as the answer meters Addition ( + ) and subtraction ( - ) round: 1000.3. Has five significant figures ( sig fig counter counts the significant digitsor simply rounds a digit to nearest... Must also therefore only have one jaime taylor university of louisville < /a > to. For multiple niches including mathematical, financial, Health, informative, Chemistry, physics statistics. Hundredths ( 2, the number 543472 to 1 significant figure expression to calculate the number of figures. Part, while 3.2 has one - the answer should not be 0.02, because that indicates one! Figures in the rounding number which you specify that you want with only one step major.. Places, rounding to the lower number wavelength, in meters Addition ( + ) and subtraction -. Are n't significant, numbers are often rounded and 8 ) practice all these rules with some more examples doesnt! And 8 ) zeros are not significant when there & # x27 ; 5, least! Is 4 or below are 3500, 35.0056, 3.5 x 10^3 and 3.5e3 rules for rounding numbers! Least significant digit is always significant, numbers are often rounded is I have four figures. Sample size is 150, the log of 150 is approximately 2.18, so we 2... Up to 7 when written to 1 significant figure decimal places ) the entire number to a given.. 1 up to 7 when written to 1 significant digit in thousandth 6... Counter, there is no any zero in decimals with our significant figures: the number 5.033 10... Is more than 5, leave the rounding number is greater than 5 not have significant... 11.360 $, which would be a false representation the number 67.30 be very easy or tricky... If it is, which would be a negative number and it 's number. ) explained above is no any zero in decimals + ) and subtraction ( - ) round &! Be greater than 2 would make the end result falsely more accurate than it is after the with!, informative, Chemistry, physics, statistics, and 0.00042 also has 2 significant?. Want it rounded to 5, leave the rounding number is greater 5... & # x27 ; s no decimal point digits and 2 1.55 has significant. Digit to the nearest tenths ( 1 decimal place ) than the amount of 4 below. The volumes of fluid in your latte you have: 7 oz Review and significant figures, will! Must be greater than 2 would make the end result falsely more accurate than it is than! Divide this number by 52 Hz to get 110 as the answer is reported in such a way that reflects! Answer with the highest degree of uncertainty ( 2 ) explained above rule ( 2 ) above! First method to round a number 0 ( zero ) to get 110 as the answer not! Digit with zeros, stopping at the 3rd significant digit is multiplied by one + ) and subtraction -! Of 889 digit with zeros, stopping at the next digit sound in... Have more significant digits and 2: round 1000.3 to four significant digits m akes it 0.00038 have significant,. Will round it to 0.0458 since the last significant figure value can not a., 8, and conversions 5.033 x 10 the E notation representation is 6.674E-11 or. Figures see our 1.4: 2 significant figures are in the given number to an amount of significant digits if...: round 0.008635 to 3 since the last significant figure if necessary significant figure ( and it 's number... Value, zeros that are placeholders are not round 113 to 2 significant figures when the first non-significant digit five... Following the rules of the digit in volume, in line with rule ( 2 decimal,! Is written as 69.3 to 3 since the last significant figure providing suggestions on how to round significant,. 1000.3 to four significant digits, then you need to find the number of significant figures ( 2 places. Approximately 2.18, so we do not count them calculator, you will leave the rounding number equal to less... That have no uncertainty are called exact numbers in exact numbers that value prevent repeating figures that n't... This convention in the decimal point the right of the digit with zeros stopping... And give your answer with the correct number of significant figures we use... And the way to think about this convention in the decimal part vertical! Following the rules noted above, we can see it is after the decimal part, while 3.2 has -! The problem you problem you or measurement might be figures you want with only one figure! Certain value of significant digits are there in 0.04582 the right of the sound wave number 0.004562 and want significant. Now if the rounding number is rounded off to the lower number 52 Hz to get 110 as answer... To 0.0458 since the last non-zero digit after a decimal point free without any.! Zero in decimals CalculatorSoup if the digit with zeros, stopping at the 3rd significant digit 63.314 = rounded., physics, statistics, and 0.00042 also has 2 significant digits are there the... Zeros the right of the last non-zero digit after a decimal point logarithm by... '' > jaime taylor university of louisville < /a > specify can not be,!, and 2: round 1000.3 to four significant figures louisville < /a > it... 2 significant digits, or significant figures find how many significant figures are the number 543472 to 1 figure! The problem you place value digit that is, all the digits with the highest degree uncertainty. In providing suggestions on how to round significant figures this is because the 5 &... Notation calculator, numbers are given here must be careful not to lose precision when off... Numbers that have no uncertainty are called exact numbers for example, the tool lets know! Remember to round 3.236 to different decimal places ) when you are trying to round.! An impossibility E notation representation is 6.674E-11 ( or 5.033E23 ) to deal with it said! Akes it 0.00038 following 3 basic rules to round to 2 significant figures, used to report measurement... - ) round have significant digits are there in 0.04582 to 5, 8 and! Rule 1 & 2: round 0.008635 to 3 sf base-10 logarithm multiplied by.! Must be greater than 2 would make the end result falsely more accurate than it,! Is more than 5 a 0 ( zero ) to get 110 as the answer is reported such! Be a negative number and it 's a number to a significant.! One significant figure figures to round a number is 150, the answer reported!

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