Question

What is the length of a diagonal of a rectangular picture whose sides are 15 inches by 17 inches? Round to the nearest tenth of an inch.

Answer 1

First, 32 rounded to the nearest ten is:

30

Explanation:

When rounding to the nearest ten, like we did with 32 above, we use the following rules:

A) We round the number up to the nearest ten if the last digit in the number is 5, 6, 7, 8, or 9.

B) We round the number down to the nearest ten if the last digit in the number is 1, 2, 3, or 4.

C) If the last digit is 0, then we do not have to do any rounding, because it is already to the ten.