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Grade 1 · Math · On Level

Free Missing Addends Within 20 worksheet - version 7

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 · On-level practice · 12 questions · Version PG-1M78HFI-JDC3

Free printable
1.__ + 9 = 18
2.__ + 2 = 2
3.__ + 2 = 7
4.__ + 18 = 18
5.__ + 17 = 19
6.__ + 3 = 20
7.__ + 6 = 20
8.__ + 9 = 20
9.__ + 14 = 19
10.__ + 5 = 7
11.__ + 14 = 17
12.__ + 7 = 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 7
  1. __ + 9 = 189
  2. __ + 2 = 20
  3. __ + 2 = 75
  4. __ + 18 = 180
  5. __ + 17 = 192
  6. __ + 3 = 2017
  7. __ + 6 = 2014
  8. __ + 9 = 2011
  9. __ + 14 = 195
  10. __ + 5 = 72
  11. __ + 14 = 173
  12. __ + 7 = 2013

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.