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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.

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Missing Addends Within 20

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

Free printable
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
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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.