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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 13 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 867 − 152 by rounding each number to the nearest hundred, then work it out.
2.Estimate 478 − 326 by rounding each number to the nearest hundred, then work it out.
3.Estimate 665 − 292 by rounding each number to the nearest hundred, then work it out.
4.Estimate 858 − 256 by rounding each number to the nearest hundred, then work it out.
5.Estimate 881 − 211 by rounding each number to the nearest hundred, then work it out.
6.Estimate 980 − 356 by rounding each number to the nearest hundred, then work it out.
7.Estimate 535 − 171 by rounding each number to the nearest hundred, then work it out.
8.Estimate 751 − 163 by rounding each number to the nearest hundred, then work it out.

LessonPrint · 3.NBT.A.2 · Set 13 · free to copy for classroom use

Answer key — Subtract Within 1000 — Estimate First

Set 13. Prints on its own sheet.

  1. 1.about 700; exactly 715
  2. 2.about 200; exactly 152
  3. 3.about 400; exactly 373
  4. 4.about 600; exactly 602
  5. 5.about 700; exactly 670
  6. 6.about 600; exactly 624
  7. 7.about 300; exactly 364
  8. 8.about 600; exactly 588

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