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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 9 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 891 − 222 by rounding each number to the nearest hundred, then work it out.
2.Estimate 841 − 249 by rounding each number to the nearest hundred, then work it out.
3.Estimate 866 − 236 by rounding each number to the nearest hundred, then work it out.
4.Estimate 574 − 158 by rounding each number to the nearest hundred, then work it out.
5.Estimate 712 − 341 by rounding each number to the nearest hundred, then work it out.
6.Estimate 820 − 260 by rounding each number to the nearest hundred, then work it out.
7.Estimate 758 − 119 by rounding each number to the nearest hundred, then work it out.
8.Estimate 405 − 306 by rounding each number to the nearest hundred, then work it out.

LessonPrint · 3.NBT.A.2 · Set 9 · free to copy for classroom use

Answer key — Subtract Within 1000 — Estimate First

Set 9. Prints on its own sheet.

  1. 1.about 700; exactly 669
  2. 2.about 600; exactly 592
  3. 3.about 700; exactly 630
  4. 4.about 400; exactly 416
  5. 5.about 400; exactly 371
  6. 6.about 500; exactly 560
  7. 7.about 700; exactly 639
  8. 8.about 100; exactly 99

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