Question

Question 3(a)

Estimate the following product using general rule:
578 x 161

Answer 1

Rule : Round off each factor to its greatest place(nearest hundred), then multiply the rounded off factors.

578 x 161
578 round off to nearest hundred $\Rightarrow$ 600
161 round off to nearest hundred $\Rightarrow$ 200
$\therefore$The estimated product = 600 x 200 = 1,20,000