Rounding replaces a number with a nearby simpler one to a chosen place value. Look at the digit immediately to the right of that place: 5 or more rounds up, 4 or less rounds down.
Math Dictionary / Rounding
Rounding
Rounding replaces a number with a nearby number that is easier to use.
Number SystemGrade 3Grade 4Grade 5Grade 6GED
What it means
The rounded number is less exact but often easier to estimate with.
Also called: round off
Examples
| 47 rounds to 50 to the nearest ten |
| 3.68 rounds to 3.7 to the nearest tenth |
| 149 rounds to 100 to the nearest hundred |
Common mistake
Look at the digit to the right of the place you are rounding to.
Try one
Question: Round 684 to the nearest hundred.
Show answer
700.