2020 Units and MeasurementsSignificant Figures Medium Question 2 of 2 in Significant Figures

Taking into account of the significant figures, what is the value of 9.99 m − 0.0099 m?

A 9.98 m
B 9.980 m
C 9.9 m
D 9.9801 m

The answer is A.

Solution

9.99 – 0.0099 = 9.9801 m In subtraction, the result should be reported to the least number of decimal places among the given values (two, from 9.99). So the answer is 9.98 m.

Concept significant figures in subtraction

Significant Figures in past papers

2 questions from this chapter have appeared across 2 exam years.