Question

By rounding each number to 1 significant figure, estimate the answer to 23.4 x 13.9 /0.18 Thanks

Answer 1

1000

Explanation:

23.4 to 1 sf gives 20

13.9 to 1 sf gives 10

0.18 to 1 sf gives 0.2

Therefore it becomes 20 × 10 ÷ 0.2 = 200 ÷ 0.2 = 1000