Rounding to the nearest 10 means replacing a whole number with the multiple of 10 that is closest, using its ones digit to determine whether to keep the tens digit unchanged (0–4) or increase it by one (5–9), then writing zero in the ones place. A number ending in 5 is exactly halfway and rounds up; this place-value reasoning supports estimation and computation with larger whole numbers, without extending to decimals or negative numbers.
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Detailed Explanation: Round numbers to the nearest 10
To round a whole number to the nearest :
- Look at the ones digit.
- If the ones digit is –, keep the tens digit the same.
- If the ones digit is –, increase the tens digit by .
- Replace the ones digit with .
Example: Round to the nearest .
- The ones digit is .
- Since is in the range –, increase the tens digit to .
- Replace the ones digit with .
Therefore,
So, rounded to the nearest is .
Learn by doing: Round numbers to the nearest 10
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Rounding Whole Numbers - Tens to Nearest Ten
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This Worksheet Includes:
- Rounding Whole Numbers - Tens to Nearest Ten
- Rounding Whole Numbers - Hundreds to Nearest Ten
Units Teaching This Skill
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