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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 21 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 27.73 + 4.43 by rounding each number to the nearest whole number, then work it out.
2.Estimate 7.78 + 21.66 by rounding each number to the nearest whole number, then work it out.
3.Estimate 2.90 + 13.06 by rounding each number to the nearest whole number, then work it out.
4.Estimate 22.17 + 22.67 by rounding each number to the nearest whole number, then work it out.
5.Estimate 20.33 − 8.12 by rounding each number to the nearest whole number, then work it out.
6.Estimate 11.25 − 4.84 by rounding each number to the nearest whole number, then work it out.
7.Estimate 30.63 − 4.64 by rounding each number to the nearest whole number, then work it out.
8.Estimate 28.51 − 2.41 by rounding each number to the nearest whole number, then work it out.

LessonPrint · 5.NBT.A.4 · Set 21 · free to copy for classroom use

Answer key — Rounding and Estimating

Set 21. Prints on its own sheet.

  1. 1.about 32; exactly 32.16
  2. 2.about 30; exactly 29.44
  3. 3.about 16; exactly 15.96
  4. 4.about 45; exactly 44.84
  5. 5.about 12; exactly 12.21
  6. 6.about 6; exactly 6.41
  7. 7.about 26; exactly 25.99
  8. 8.about 27; exactly 26.1

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