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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 2 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 701 − 322 by rounding each number to the nearest hundred, then work it out.
2.Estimate 930 − 280 by rounding each number to the nearest hundred, then work it out.
3.Estimate 721 − 181 by rounding each number to the nearest hundred, then work it out.
4.Estimate 615 − 327 by rounding each number to the nearest hundred, then work it out.
5.Estimate 783 − 296 by rounding each number to the nearest hundred, then work it out.
6.Estimate 958 − 243 by rounding each number to the nearest hundred, then work it out.
7.Estimate 770 − 354 by rounding each number to the nearest hundred, then work it out.
8.Estimate 937 − 250 by rounding each number to the nearest hundred, then work it out.

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

Answer key — Subtract Within 1000 — Estimate First

Set 2. Prints on its own sheet.

  1. 1.about 400; exactly 379
  2. 2.about 600; exactly 650
  3. 3.about 500; exactly 540
  4. 4.about 300; exactly 288
  5. 5.about 500; exactly 487
  6. 6.about 800; exactly 715
  7. 7.about 400; exactly 416
  8. 8.about 600; exactly 687

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