# Place value and rounding

Contents

Going a bit deeper with our understanding of place value from 2nd grade. We'll apply this knowledge to learn to round things to the nearest 10 and 100.

## Rounding

Rounding is useful when you are trying to roughly estimate numbers.

Rounding to nearest 10

Sal uses a number line to round 2-digit numbers to the nearest ten.

Rounding to nearest 100

Sal uses a number line to round 3-digit numbers to the nearest hundred.

Rounding to nearest 10 and 100

Sal rounds up to 4-digit numbers to the nearest ten and hundred.

Round to nearest 10 or 100

Practice rounding to the nearest ten and rounding to the nearest hundred.

Round to nearest 10 or 100 on the number line

Practice rounding to the nearest ten and rounding to the nearest hundred on the number line.

Rounding challenge

Give your brain a workout with these challenge problems on rounding.