# Level 3-4 Numbers - Rounding

Rounding numbers can be useful when estimating the answers to calculations so it's an important part of KS3 Maths. Knowing whether to round a number up or down is vital. It very much depends on whether the number is above or below half way. This quiz will test you on rounding numbers up and down.

The same rules apply to rounding decimal numbers and whole ones. Just as the whole number 44 is rounded down to 40, the decimal number 4.4 is rounded down to 4. Fractions can also be rounded up or down. For example, ^{4}⁄_{9} would be rounded down and ^{5}⁄_{9} would be rounded up. Round the numbers to the nearest ten, hundred or thousand. For example 39 + 12 can be rounded to 40 + 10 = 50, therefore the answer will be approximately 50.

The quiz that follows should help you to get your head around rounding numbers!

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