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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 12 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 886 − 271 by rounding each number to the nearest hundred, then work it out.
2.Estimate 814 − 135 by rounding each number to the nearest hundred, then work it out.
3.Estimate 599 − 379 by rounding each number to the nearest hundred, then work it out.
4.Estimate 881 − 176 by rounding each number to the nearest hundred, then work it out.
5.Estimate 898 − 165 by rounding each number to the nearest hundred, then work it out.
6.Estimate 996 − 315 by rounding each number to the nearest hundred, then work it out.
7.Estimate 886 − 375 by rounding each number to the nearest hundred, then work it out.
8.Estimate 688 − 163 by rounding each number to the nearest hundred, then work it out.

LessonPrint · 3.NBT.A.2 · Set 12 · free to copy for classroom use

Answer key — Subtract Within 1000 — Estimate First

Set 12. Prints on its own sheet.

  1. 1.about 600; exactly 615
  2. 2.about 700; exactly 679
  3. 3.about 200; exactly 220
  4. 4.about 700; exactly 705
  5. 5.about 700; exactly 733
  6. 6.about 700; exactly 681
  7. 7.about 500; exactly 511
  8. 8.about 500; exactly 525

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