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Grade 1 · Math · Building Confidence

Free Missing Addends Within 20 worksheet - version 13

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 · Building confidence · 12 questions · Version PG-T81XPV-RBT8

Free printable
1.__ + 3 = 20
2.__ + 5 = 20
3.__ + 14 = 19
4.__ + 8 = 16
5.__ + 15 = 20
6.__ + 18 = 20
7.__ + 2 = 20
8.__ + 19 = 19
9.__ + 0 = 7
10.__ + 4 = 20
11.__ + 5 = 17
12.__ + 10 = 16
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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 13
  1. __ + 3 = 2017
  2. __ + 5 = 2015
  3. __ + 14 = 195
  4. __ + 8 = 168
  5. __ + 15 = 205
  6. __ + 18 = 202
  7. __ + 2 = 2018
  8. __ + 19 = 190
  9. __ + 0 = 77
  10. __ + 4 = 2016
  11. __ + 5 = 1712
  12. __ + 10 = 166

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.