Skip to content
LessonPrint

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 6 of 25 · the same problems every time you open this link.

Next set

One paper per pupil

12345678910111213141516171819202122232425

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 493 − 177 by rounding each number to the nearest hundred, then work it out.
2.Estimate 776 − 278 by rounding each number to the nearest hundred, then work it out.
3.Estimate 566 − 395 by rounding each number to the nearest hundred, then work it out.
4.Estimate 983 − 192 by rounding each number to the nearest hundred, then work it out.
5.Estimate 699 − 179 by rounding each number to the nearest hundred, then work it out.
6.Estimate 534 − 392 by rounding each number to the nearest hundred, then work it out.
7.Estimate 883 − 387 by rounding each number to the nearest hundred, then work it out.
8.Estimate 741 − 103 by rounding each number to the nearest hundred, then work it out.

LessonPrint · 3.NBT.A.2 · Set 6 · free to copy for classroom use

Answer key — Subtract Within 1000 — Estimate First

Set 6. Prints on its own sheet.

  1. 1.about 300; exactly 316
  2. 2.about 500; exactly 498
  3. 3.about 200; exactly 171
  4. 4.about 800; exactly 791
  5. 5.about 500; exactly 520
  6. 6.about 100; exactly 142
  7. 7.about 500; exactly 496
  8. 8.about 600; exactly 638

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