PencilGoPencilGo

Grade 1 · Math · Challenge

Free Missing Addends Within 20 worksheet - version 4

Find the missing part in addition equations through 20. This printable version includes 12 grade-appropriate questions and a separate answer sheet.

Download free PDF

Missing Addends Within 20

Grade 1 · Stretch challenge · 12 questions · Version PG-UN0RK7-1OAJ

1.

__ + 12 = 19

2.

__ + 5 = 12

3.

__ + 3 = 20

4.

__ + 9 = 10

5.

__ + 1 = 2

6.

__ + 5 = 20

7.

__ + 8 = 20

8.

__ + 12 = 18

9.

__ + 13 = 13

10.

__ + 9 = 17

11.

__ + 14 = 20

12.

__ + 9 = 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 4
  1. __ + 12 = 197
  2. __ + 5 = 127
  3. __ + 3 = 2017
  4. __ + 9 = 101
  5. __ + 1 = 21
  6. __ + 5 = 2015
  7. __ + 8 = 2012
  8. __ + 12 = 186
  9. __ + 13 = 130
  10. __ + 9 = 178
  11. __ + 14 = 206
  12. __ + 9 = 2011

Worked example

__ + 6 = 14. Think 14 - 6, so the missing addend is 8.

Common mistake

Adding the known addend and total together.

Helpful hint

Subtract the known part from the total.