Skip to content
LessonPrint

Round then Estimate is a free printable Grade 3 math worksheet on using rounding to check an answer, aligned to Common Core standard 3.NBT.A.1. 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 students in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.

Set 22 of 25 · the same problems every time you open this link.

Next set

One paper per student

12345678910111213141516171819202122232425

Set 1 has all 25 in a single PDF. All 25 sets ask different questions.

Round then Estimate

3.NBT.A.1

NameDate

Estimate first, then work it out.

1.Estimate 701 + 470 by rounding each number to the nearest ten, then work it out.
2.Estimate 435 + 788 by rounding each number to the nearest ten, then work it out.
3.Estimate 673 + 750 by rounding each number to the nearest ten, then work it out.
4.Estimate 764 + 646 by rounding each number to the nearest ten, then work it out.
5.Estimate 481 + 302 by rounding each number to the nearest ten, then work it out.
6.Estimate 800 + 237 by rounding each number to the nearest ten, then work it out.
7.Estimate 204 + 603 by rounding each number to the nearest ten, then work it out.
8.Estimate 606 + 448 by rounding each number to the nearest ten, then work it out.

LessonPrint · 3.NBT.A.1 · Set 22 · free to copy for classroom use

Answer key — Round then Estimate

Set 22. Prints on its own sheet.

  1. 1.about 1170; exactly 1171
  2. 2.about 1230; exactly 1223
  3. 3.about 1420; exactly 1423
  4. 4.about 1410; exactly 1410
  5. 5.about 780; exactly 783
  6. 6.about 1040; exactly 1037
  7. 7.about 800; exactly 807
  8. 8.about 1060; exactly 1054

Last reviewed 2026-09-05. Aligned to 3.NBT.A.1 of the Common Core State Standards for Mathematics.