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Grade 1 · Math · Building Confidence

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

1.

__ + 13 = 15

2.

__ + 12 = 16

3.

__ + 7 = 9

4.

__ + 9 = 19

5.

__ + 7 = 14

6.

__ + 13 = 14

7.

__ + 5 = 20

8.

__ + 7 = 15

9.

__ + 5 = 7

10.

__ + 8 = 20

11.

__ + 8 = 8

12.

__ + 6 = 17

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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. __ + 13 = 152
  2. __ + 12 = 164
  3. __ + 7 = 92
  4. __ + 9 = 1910
  5. __ + 7 = 147
  6. __ + 13 = 141
  7. __ + 5 = 2015
  8. __ + 7 = 158
  9. __ + 5 = 72
  10. __ + 8 = 2012
  11. __ + 8 = 80
  12. __ + 6 = 1711

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.