Grade 3 · Math · Lesson 3

Round Numbers to the Nearest 10 and 100

Rounding means finding the nearest 10 or 100 that a number is closest to. It helps us estimate quickly and work with simpler numbers. We use a number line to see exactly which "round" number a value is closest to.

What this lesson teaches

1Round a 2-digit number to the nearest 10 on a number line
2Round a 3-digit number to the nearest 100 on a number line
3Explain why a number rounds up or down based on the digit in the rounding place

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