Grade 5 · Math · Lesson 3

Rounding to the Nearest 10, 100, and 1,000

Rounding swaps an exact number for a nearby benchmark that is easier to use. We round to the nearest 10, 100, or 1,000 to estimate sums, compare large numbers, or report data without showing every digit.

What this lesson teaches

1Round whole numbers to the nearest ten, hundred, and thousand
2Use a number line to find the closer benchmark for a given number
3Apply the rule that 5 or more rounds up and less than 5 rounds down
4Explain in words why a number rounds up or down for a given place

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