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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 18 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 4.71 + 5.57 by rounding each number to the nearest whole number, then work it out.
2.Estimate 3.68 + 21.35 by rounding each number to the nearest whole number, then work it out.
3.Estimate 20.21 + 20.22 by rounding each number to the nearest whole number, then work it out.
4.Estimate 17.09 + 10.98 by rounding each number to the nearest whole number, then work it out.
5.Estimate 27.00 − 3.38 by rounding each number to the nearest whole number, then work it out.
6.Estimate 17.20 − 5.80 by rounding each number to the nearest whole number, then work it out.
7.Estimate 17.75 − 2.21 by rounding each number to the nearest whole number, then work it out.
8.Estimate 23.41 − 2.37 by rounding each number to the nearest whole number, then work it out.

LessonPrint · 5.NBT.A.4 · Set 18 · free to copy for classroom use

Answer key — Rounding and Estimating

Set 18. Prints on its own sheet.

  1. 1.about 11; exactly 10.28
  2. 2.about 25; exactly 25.03
  3. 3.about 40; exactly 40.43
  4. 4.about 28; exactly 28.07
  5. 5.about 24; exactly 23.62
  6. 6.about 11; exactly 11.4
  7. 7.about 16; exactly 15.54
  8. 8.about 21; exactly 21.04

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