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Q: Significant figures adding and subtracting
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How do you decide how many significant figures the answer should have when you are adding and subtracting?

The least number of significant figures in any number of the problem determines the number of significant figures in the answer.


How do you determine how many significant figures to keep in an answer obtained by adding and subtracting?

The least number of significant figures in any number of the problem determines the number of significant figures in the answer.


What determines the number of allowed significant digits when adding or subtracting?

The least number of significant figures in any number of the problem determines the number of significant figures in the answer.


What is the rule for significant figures when adding or subtracting decimals?

When adding and/or subtracting, your answer can only show as many decimal places as the measurement having the fewest number in the decimal places.


Why are significant figures used and how are significant figures obtained?

Significant figures are used to receive a more accurate number. To obtain the number you you multiply or divide the quantities, leave as many significant figures in the answer as there are in the quantity with the least number or significant figures. If adding or subtracting quantities, leave the same number of decimal places in the answer as there are in the quantity with the least number of decimal places


Significant figures of 5.7 plus 3.2?

The sum of 5.1 and 3.2 is 8.9 with two significant figures. When adding or subtracting numbers, the result should have the same number of decimal places as the number with the fewest decimal places, which in this case is 3.2.


When you're adding numbers how many significant numbers are there?

The least number of significant figures in any number of the problem determines the number of significant figures in the answer.


What must each number have when adding and subtracting scientific numbers?

same number of significant digits


How many significant figures are in 14 plus 3.078?

Take the least number of decimal places when adding or subtracting, therefore the answer is 17 to no decimal places.If it was 14 x 3.078 the answer would be 43 to 2 significant figures. The rule for multiplication/division is to use the least number of sig figs in the components: 14 has 2 and 3.078 has 4 so the answer should use 2.


In adding the measurements 11.074m 18.2m and 16.943m what should be the number of significant figures in the result?

The least number of significant figures in any number of the problem determines the number of significant figures in the answer.


How do you subtract sig figs?

When subtracting with significant figures, the answer should be rounded to the least number of decimal places of any number in the calculation. For example, if you subtract 3.25 from 8.621, your answer should be rounded to the nearest hundredth as 5.371 to maintain proper significant figures.


Rules on addition and subtraction of significant figures?

When adding or subtracting numbers, the answer should have the same number of decimal places as the measurement with the fewest decimal places. The final answer should be rounded to the least number of decimal places among the numbers used in the calculation. Only the decimal portion of the number is considered when determining significant figures for addition and subtraction.