Rounding
Rounding by comparison
Fill in the multiples immediately below and above each number, then circle the nearer value. Practice tens, hundreds or thousands with an optional worked example in each group.
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Rounding whole numbers
Round positive whole numbers to the nearest ten, hundred or thousand. Choose fixed or mixed digit ranges, 10, 20 or 30 questions, and a separate answer key.
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Identify the requested rounding place. Compare the two neighboring multiples and write the nearer one. When a number is exactly halfway, choose the greater multiple.
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Learning objective
What this activity builds
Use place value and distance to choose the nearest multiple of ten, one hundred or one thousand.
Worked example
Round 375 to the nearest ten, then to the nearest hundred.
Nearest ten: 380. Nearest hundred: 400.
375 lies halfway between 370 and 380, so choose 380. It lies between 300 and 400 and is closer to 400. The requested place changes the two values you compare.
Teaching notes
Make the practice count
- Start with two-digit numbers and nearest-ten rounding. Move to three digits only after learners can identify the bounding tens.
- Ask for both neighboring multiples before accepting an answer. This shows why changing a digit alone is not a complete explanation.
- The fixed-width settings use the same digit width in both groups. Mixed settings increase the digit width in the second group.
- Include exact multiples and carry cases in discussion: 80 stays 80 when rounded to ten, while 995 becomes 1000.
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A useful next step
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Use an 11-column reference chart with directional arrows to round numbers from 0 to 100 to the nearest ten.
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Rounding decimals
Round decimals to the nearest tenth, hundredth or thousandth. Two groups add one then two extra decimal places, with exact answers that preserve the requested precision.
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