Mathematics for IGCSE & O level - Estimation (Section 3 - No. 34)
When rounding numbers to estimate a square root, which of the following should you do?
Round to the nearest whole number.
Round to the nearest tenth.
Round to the nearest perfect square.
Use a calculator for precise results.
Forklaring
When estimating square roots, round the number to the nearest perfect square to simplify the calculation.