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Grade 1 · Math · On Level

Free Missing Addends Within 20 worksheet - version 19

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-1F5IQ93-JDC3

Free printable
1.__ + 7 = 16
2.__ + 15 = 20
3.__ + 10 = 14
4.__ + 8 = 16
5.__ + 11 = 20
6.__ + 0 = 6
7.__ + 12 = 19
8.__ + 5 = 20
9.__ + 1 = 12
10.__ + 6 = 14
11.__ + 2 = 14
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 19
  1. __ + 7 = 169
  2. __ + 15 = 205
  3. __ + 10 = 144
  4. __ + 8 = 168
  5. __ + 11 = 209
  6. __ + 0 = 66
  7. __ + 12 = 197
  8. __ + 5 = 2015
  9. __ + 1 = 1211
  10. __ + 6 = 148
  11. __ + 2 = 1412
  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.