Question

Estimate the value of 64.127 x 3.413

Answer 1

192

Explanation:

To estimate the value of 64.127 × 3.413, we can simply round each decimal downwards:

Why do we round downwards?

We round downwards because to in order to estimate the product of 2 numbers, we need to make the equation as simple as possible. One way we can do this is round each number either upwards, or downwards.

To find out if we round upwards or downwards, we use the rule 5 or more rounds up.

• 64.127. 1 is less than 5, so we round downward. It now becomes 64.

• 3.413. Once again, 4 is less than 5 so we round down. It now becomes 3.

Now we can solve.

• 64 × 3 = 192

Therefore, the estimated value of 64.127 × 3.413 is 192.