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Rounding and Estimating is a free printable Grade 5 math worksheet on using rounding to check a calculation, aligned to Common Core standard 5.NBT.A.4. It prints 8 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two students in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.

Set 24 of 25 · the same problems every time you open this link.

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Set 1 has all 25 in a single PDF. All 25 sets ask different questions.

Rounding and Estimating

5.NBT.A.4

NameDate

Estimate first, then work it out.

1.Estimate 27.43 + 15.23 by rounding each number to the nearest whole number, then work it out.
2.Estimate 9.50 + 21.80 by rounding each number to the nearest whole number, then work it out.
3.Estimate 15.61 + 6.75 by rounding each number to the nearest whole number, then work it out.
4.Estimate 18.07 + 22.46 by rounding each number to the nearest whole number, then work it out.
5.Estimate 17.06 − 7.93 by rounding each number to the nearest whole number, then work it out.
6.Estimate 32.69 − 5.74 by rounding each number to the nearest whole number, then work it out.
7.Estimate 27.55 − 7.01 by rounding each number to the nearest whole number, then work it out.
8.Estimate 15.21 − 4.71 by rounding each number to the nearest whole number, then work it out.

LessonPrint · 5.NBT.A.4 · Set 24 · free to copy for classroom use

Answer key — Rounding and Estimating

Set 24. Prints on its own sheet.

  1. 1.about 42; exactly 42.66
  2. 2.about 32; exactly 31.3
  3. 3.about 23; exactly 22.36
  4. 4.about 40; exactly 40.53
  5. 5.about 9; exactly 9.13
  6. 6.about 27; exactly 26.95
  7. 7.about 21; exactly 20.54
  8. 8.about 10; exactly 10.5

Last reviewed 2026-09-05. Aligned to 5.NBT.A.4 of the Common Core State Standards for Mathematics.