Question

state the rounding rules for adding and subtracting measured numbers and for multiplying and dividing measured numbers. give examples of the use of these rules. choose the correct answer below. a. for addition and subtraction, round your answer to the same number of significant digits as the measurement with the fewest significant digits. for multiplication and division, round your answer to the same precision as the least precise number in the problem. examples include 4.2 - 2 = 2.2 and 4.2×2 = 8.4. b. for addition and subtraction, round your answer to the same number of significant digits as the measurement with the fewest significant digits. for multiplication and division, round your answer to the same precision as the least precise number in the problem. examples include 4.2 - 2 = 2 and 4.2×2 = 8. c. for addition and subtraction, round your answer to the same precision as the least precise number in the problem. for multiplication and division, round your answer to the same number of significant digits as the measurement with the fewest significant digits. examples include 4.2 - 2 = 2.2 and 4.2×2 = 8.4. d. for addition and subtraction, round your answer to the same precision as the least precise number in the problem. for multiplication and division, round your answer to the same number of significant digits as the measurement with the fewest significant digits. examples include 4.2 - 2 = 2 and 4.2×2 = 8.

Explanation:

When adding and subtracting measured numbers, we round to the same precision as the least - precise number. For example, in 4.2 - 2, 2 is the least - precise number (no decimal places), so the result 2.2 should be rounded to 2. When multiplying and dividing measured numbers, we round to the same number of significant digits as the measurement with the fewest significant digits. In 4.2×2, 2 has one significant digit, so the result 8.4 should be rounded to 8.

Answer:

D. For addition and subtraction, round your answer to the same precision as the least precise number in the problem. For multiplication and division, round your answer to the same number of significant digits as the measurement with the fewest significant digits. Examples include 4.2 - 2 = 2 and 4.2×2 = 8.