Rounding Decimals
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Skill: Rounding decimals to the nearest whole number, tenth, and hundredth
10 versions, each with its own answer key
Same skill and layout, a fresh set of problems in every version, so children can keep practicing without repeating a page. Problems are not repeated between versions unless a skill has only a small number of possible problems (for example, the addition facts within 10).
- Version 1: Sheet · Key · Both
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About this worksheet
Rounding decimals helps students estimate money, measurements, and answers to longer calculations. The rule is the same one used for whole numbers: look at the digit just to the right of the place you are rounding to. If it is 5 or more, round up; if it is 4 or less, keep the digit. This fifth-grade worksheet has three parts. Part A rounds numbers with tenths to the nearest whole number. Part B rounds hundredths to the nearest tenth. Part C rounds thousandths to the nearest hundredth.
Watch for numbers that make a digit roll over, such as 9.96 rounding to 10.0, which is the trickiest case. Answers keep the place they were rounded to, so 3.5 stays 3.5 and 10.0 keeps its zero.
How to use it: have students underline the digit in the rounding place and circle the digit to its right. Then decide whether to round up or keep the digit. A number line between two tenths or hundredths shows which one a number is closer to. Talk about real examples, such as rounding $4.68 to about $4.70 or a 12.4 second race time to 12 seconds.
The answer key lists every rounded number. This worksheet supports Common Core standard 5.NBT.A.4 (use place value understanding to round decimals to any place). It follows naturally from our Rounding to 10 and 100 and Decimal Place Value worksheets, and it pairs well with our Adding Decimals to Hundredths worksheet.
