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Subtract Within 1000 — Estimate First is a free printable Grade 3 maths worksheet on estimating a difference before working it out, aligned to Common Core standard 3.NBT.A.2. 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 pupils in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.

Set 7 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.

Subtract Within 1000 — Estimate First

3.NBT.A.2

NameDate

Estimate first, then work it out.

1.Estimate 793 − 115 by rounding each number to the nearest hundred, then work it out.
2.Estimate 976 − 318 by rounding each number to the nearest hundred, then work it out.
3.Estimate 813 − 153 by rounding each number to the nearest hundred, then work it out.
4.Estimate 626 − 101 by rounding each number to the nearest hundred, then work it out.
5.Estimate 944 − 315 by rounding each number to the nearest hundred, then work it out.
6.Estimate 991 − 136 by rounding each number to the nearest hundred, then work it out.
7.Estimate 498 − 327 by rounding each number to the nearest hundred, then work it out.
8.Estimate 657 − 160 by rounding each number to the nearest hundred, then work it out.

LessonPrint · 3.NBT.A.2 · Set 7 · free to copy for classroom use

Answer key — Subtract Within 1000 — Estimate First

Set 7. Prints on its own sheet.

  1. 1.about 700; exactly 678
  2. 2.about 700; exactly 658
  3. 3.about 600; exactly 660
  4. 4.about 500; exactly 525
  5. 5.about 600; exactly 629
  6. 6.about 900; exactly 855
  7. 7.about 200; exactly 171
  8. 8.about 500; exactly 497

Last reviewed 2026-09-05. Aligned to 3.NBT.A.2 of the Common Core State Standards for Mathematics.