Question

If Sam wants to estimate 949 bags of 545 kilogram of rice in each, which expression would be best for him to use and to calculate the total kilogram of rice?

• A. 900 $\times$ 555
• B. 990 $\times$ 550
• C. 999 $\times$ 500
• D. 900 $\times$ 500

Answer 1

The correct option is D 900 $\times$ 500

Say:
$\bullet$ Estimation is approximating the given value to make the calculation easier.

Steps:
$\bullet$ If we round off the given numbers to the nearest hundreds, then the calculation will be much easier.

$\bullet$ What is the best-estimated value of 949?
Ans: 900

$\bullet$ What is the best-estimated value of 545?
Ans: 500

$\bullet$ Therefore, the expression 900 × 500 would be the best.

WB: