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Grade 1 · Math · On Level

Free Missing Addends Within 20 worksheet - version 15

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-1BTNHXF-JDC3

Free printable
1.__ + 12 = 18
2.__ + 17 = 19
3.__ + 2 = 13
4.__ + 7 = 20
5.__ + 5 = 20
6.__ + 12 = 20
7.__ + 8 = 16
8.__ + 4 = 20
9.__ + 1 = 10
10.__ + 11 = 16
11.__ + 3 = 16
12.__ + 1 = 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 15
  1. __ + 12 = 186
  2. __ + 17 = 192
  3. __ + 2 = 1311
  4. __ + 7 = 2013
  5. __ + 5 = 2015
  6. __ + 12 = 208
  7. __ + 8 = 168
  8. __ + 4 = 2016
  9. __ + 1 = 109
  10. __ + 11 = 165
  11. __ + 3 = 1613
  12. __ + 1 = 2019

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.