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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 3 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 845 − 196 by rounding each number to the nearest hundred, then work it out.
2.Estimate 635 − 125 by rounding each number to the nearest hundred, then work it out.
3.Estimate 480 − 150 by rounding each number to the nearest hundred, then work it out.
4.Estimate 433 − 365 by rounding each number to the nearest hundred, then work it out.
5.Estimate 452 − 102 by rounding each number to the nearest hundred, then work it out.
6.Estimate 940 − 397 by rounding each number to the nearest hundred, then work it out.
7.Estimate 824 − 183 by rounding each number to the nearest hundred, then work it out.
8.Estimate 917 − 150 by rounding each number to the nearest hundred, then work it out.

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

Answer key — Subtract Within 1000 — Estimate First

Set 3. Prints on its own sheet.

  1. 1.about 600; exactly 649
  2. 2.about 500; exactly 510
  3. 3.about 300; exactly 330
  4. 4.about 0; exactly 68
  5. 5.about 400; exactly 350
  6. 6.about 500; exactly 543
  7. 7.about 600; exactly 641
  8. 8.about 700; exactly 767

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