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Grade 1 · Math · Building Confidence

Free Missing Addends Within 20 worksheet - version 20

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-172X5P-RBT8

1.

__ + 14 = 20

2.

__ + 11 = 18

3.

__ + 4 = 20

4.

__ + 0 = 18

5.

__ + 11 = 13

6.

__ + 12 = 19

7.

__ + 3 = 11

8.

__ + 0 = 20

9.

__ + 18 = 18

10.

__ + 16 = 19

11.

__ + 13 = 20

12.

__ + 3 = 7

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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 20
  1. __ + 14 = 206
  2. __ + 11 = 187
  3. __ + 4 = 2016
  4. __ + 0 = 1818
  5. __ + 11 = 132
  6. __ + 12 = 197
  7. __ + 3 = 118
  8. __ + 0 = 2020
  9. __ + 18 = 180
  10. __ + 16 = 193
  11. __ + 13 = 207
  12. __ + 3 = 74

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.