Mathematics for IGCSE & O level - Estimation (Section 2 - No. 38)
What is a good reason to round numbers to 1 s.f. before calculating?
To make it easier to multiply or divide mentally.
To make the answer more accurate.
To make the answer more complicated.
To impress your teacher.
Giải thích
Rounding to 1 s.f. simplifies calculations.