Question

Round 31.2 to nearest whole number

Answer 1

The first digit to the right of the units digit is less than 5. Therefore, we round the number down.

`31.2\approx31`

Answer 2

`\large\boxed{\sf{31}}`

Detailed explanation:

Hi there! Our task is to round 31.2 to the nearest whole number.

So the result shouldn't have any numbers after the decimal point.

But what do we do with the number after the decimal point? Right now, we have 2 after the decimal point. Since 2 is less than 5, we drop it.

The result is 31.

`\bigstar` Therefore, 31.2 rounded to the nearest whole number is 31.

Note: Remember the rounding rules.

• if the number we're rounding is followed by a digit less than 5, we drop it.
• if the number we're rounding is followed by a digit greater than or equal to 5, we drop that, and add 1 to the previous digit.