Rounding to the nearest 100

When rounding to the nearest hundred, look at the tens digit to decide what to do.

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Remember the rules when rounding a number to the nearest whole ten

More rounding numbers to the nearest whole ten.

Rounding the lengths of bridges and rivers, or even birds' wingspans.

Rounding numbers helps to give a good approximation of an answer. Especially important when using calculators.

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