How do you round decimals to the nearest ten?

Answer 1

The key to rounding any number to the nearest ten does not use the decimals at all. In fact, you only need to check the digit in the ones place. If the number in the ones digit is below 4, then round down. If the number in the ones digit is 5 or larger, round up.

Some Examples:

563 ---> 560 - The ones digit is a three, you round down

27 ---> 30 - The ones digit is above five, you round up

145 ---> 150 - The ones digit is a five, you round up

890 ---> 890 - The ones digit is a zero, you do nothing because it is already a ten.