PencilGoPencilGo

Grade 1 · Math · Challenge

Free Addition Within 20 worksheet - version 4

Practice addition facts and strategies with sums through 20. This printable version includes 14 grade-appropriate questions and a separate answer sheet.

Download free PDF

Addition Within 20

Grade 1 · Stretch challenge · 14 questions · Version PG-1P5KKO5-1PYH

1.

8 + 12 =

2.

11 + 9 =

3.

14 + 6 =

4.

1 + 19 =

5.

6 + 14 =

6.

5 + 3 =

7.

2 + 7 =

8.

9 + 1 =

9.

7 + 7 =

10.

7 + 13 =

11.

2 + 0 =

12.

12 + 8 =

13.

9 + 10 =

14.

16 + 4 =

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 4
  1. 8 + 12 =20
  2. 11 + 9 =20
  3. 14 + 6 =20
  4. 1 + 19 =20
  5. 6 + 14 =20
  6. 5 + 3 =8
  7. 2 + 7 =9
  8. 9 + 1 =10
  9. 7 + 7 =14
  10. 7 + 13 =20
  11. 2 + 0 =2
  12. 12 + 8 =20
  13. 9 + 10 =19
  14. 16 + 4 =20

Worked example

8 + 7 = 15. Make ten: 8 + 2 + 5 = 15.

Common mistake

Losing part of the second addend when making ten.

Helpful hint

Look for a way to make 10 first.