Question

What is 39.79949748 rounded to the nearest hundredth?

Answer 1

`Number = 39.80`

Explanation:

Given

`Number = 39.79949748`

Required

Approximate (to the nearest 100th)

This means that, we approximate at the second digit after the decimal.

So:

i.e,

Number = 39.79 [Begin approximation] 949748

The first digit after [Begin approximation] is then approximated using the following rule:

`0 - 4 \approx 0`

`5 - 9 \approx 1\\`

Since 9 falls in
`5 - 9 \approx 1\\` category, the number becomes:

`Number = 39.[79+1]`

`Number = 39.80`