Question

Question 3(c)

Estimate the following product using general rule:
1291 x 592

Answer 1

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

1291 x 592
1291 round off to nearest 100 $\Rightarrow$ 1300
592 round off to nearest 100 $\Rightarrow$ 600
$\therefore$The estimated product = 1300 x 600 = 7,80,000