PencilGo
Sign in

Grade 1 · Math · Building Confidence

Free Subtraction Within 20 worksheet - version 11

Build subtraction fluency with numbers through 20. This printable version includes 14 grade-appropriate questions and a separate answer sheet.

Download free PDF

Subtraction Within 20

Grade 1 · Building confidence · 14 questions · Version PG-1M4ZEJV-1PAM

Free printable
1.19 - 10 =
2.12 - 8 =
3.12 - 12 =
4.6 - 3 =
5.2 - 2 =
6.6 - 5 =
7.6 - 6 =
8.20 - 1 =
9.13 - 10 =
10.10 - 6 =
11.5 - 5 =
12.15 - 10 =
13.18 - 9 =
14.20 - 20 =
Worksheet PDFAnswer keyCustomize

Answers and teaching notes

Use the answers to check the work after the learner finishes. For writing prompts, the guide describes what a strong response should include.

Show answers for version 11
  1. 19 - 10 =9
  2. 12 - 8 =4
  3. 12 - 12 =0
  4. 6 - 3 =3
  5. 2 - 2 =0
  6. 6 - 5 =1
  7. 6 - 6 =0
  8. 20 - 1 =19
  9. 13 - 10 =3
  10. 10 - 6 =4
  11. 5 - 5 =0
  12. 15 - 10 =5
  13. 18 - 9 =9
  14. 20 - 20 =0

Worked example

16 - 7 = 9. Break 7 into 6 and 1: 16 - 6 - 1 = 9.

Common mistake

Switching the order of the numbers because subtraction is not commutative.

Helpful hint

Count back to 10, then subtract what remains.