6/30 SA25: Rounding

The value of a digit depending on its position.

​Place Value

Making a number simpler but keeping its value close.

​Rounding

Any of the numbers 0–9.

​Digit

​Rounding rules

Look at the digit to the right of the place you're rounding to:

• If it’s 0–4, round DOWN. (Keep the digit the same)

• If it’s 5–9, round UP. (Add 1 to the digit you're rounding)

​Rounding whole numbers Example

Round 4,762 to the nearest hundred:

• Find the hundreds place → 7 (700)

• Look to the right → 6 (tens)

• Since 6 is 5 or more, round up → 4,800

​Rounding Decimals Example

Round 3.486 to the nearest hundredth:

• Find the hundredths place → 8

• Look to the right → 6 (thousandths)

• Since 6 is 5 or more, round up → 3.49

Helpful tip! - Use a place value chart to line up digits when rounding.