Rounding to the nearest 10 is a method used to estimate a number to the nearest multiple of 10. This is helpful when you want to quickly estimate a number without needing an exact value.

To round a number to the nearest 10, you look at the digit in the ones place.

- If the ones digit is 5 or greater, you round up to the next multiple of 10.
- If the ones digit is less than 5, you round down to the previous multiple of 10.

For example:

- If you want to round 43 to the nearest 10, you look at the ones digit (3) which is less than 5, so you round down to 40.
- If you want to round 78 to the nearest 10, you look at the ones digit (8) which is 5 or greater, so you round up to 80.

Study GuideRounding to Nearest 10 Worksheet/Answer key

Rounding to Nearest 10 Worksheet/Answer key

Rounding to Nearest 10 Worksheet/Answer key

Rounding to Nearest 10

Number and Operations (NCTM)

Understand numbers, ways of representing numbers, relationships among numbers, and number systems.

Understand the place-value structure of the base-ten number system and be able to represent and compare whole numbers and decimals.

Algebra (NCTM)

Use mathematical models to represent and understand quantitative relationships.

Model problem situations with objects and use representations such as graphs, tables, and equations to draw conclusions.