PencilGo
Sign in

Grade 1 · Math · Building Confidence

Free Subtraction Within 20 worksheet - version 19

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-1JX2L03-1PAM

Free printable
1.3 - 2 =
2.1 - 1 =
3.12 - 5 =
4.10 - 9 =
5.9 - 2 =
6.7 - 7 =
7.13 - 11 =
8.6 - 5 =
9.1 - 0 =
10.20 - 20 =
11.8 - 8 =
12.18 - 1 =
13.19 - 10 =
14.6 - 2 =
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 19
  1. 3 - 2 =1
  2. 1 - 1 =0
  3. 12 - 5 =7
  4. 10 - 9 =1
  5. 9 - 2 =7
  6. 7 - 7 =0
  7. 13 - 11 =2
  8. 6 - 5 =1
  9. 1 - 0 =1
  10. 20 - 20 =0
  11. 8 - 8 =0
  12. 18 - 1 =17
  13. 19 - 10 =9
  14. 6 - 2 =4

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.