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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 5 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 857 − 291 by rounding each number to the nearest hundred, then work it out.
2.Estimate 471 − 399 by rounding each number to the nearest hundred, then work it out.
3.Estimate 756 − 201 by rounding each number to the nearest hundred, then work it out.
4.Estimate 927 − 325 by rounding each number to the nearest hundred, then work it out.
5.Estimate 816 − 133 by rounding each number to the nearest hundred, then work it out.
6.Estimate 602 − 266 by rounding each number to the nearest hundred, then work it out.
7.Estimate 894 − 284 by rounding each number to the nearest hundred, then work it out.
8.Estimate 563 − 152 by rounding each number to the nearest hundred, then work it out.

LessonPrint · 3.NBT.A.2 · Set 5 · free to copy for classroom use

Answer key — Subtract Within 1000 — Estimate First

Set 5. Prints on its own sheet.

  1. 1.about 600; exactly 566
  2. 2.about 100; exactly 72
  3. 3.about 600; exactly 555
  4. 4.about 600; exactly 602
  5. 5.about 700; exactly 683
  6. 6.about 300; exactly 336
  7. 7.about 600; exactly 610
  8. 8.about 400; exactly 411

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