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Grade 1 · Math · On Level

Free Missing Addends Within 20 worksheet - version 7

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-1M78HFI-JDC3

1.

__ + 9 = 18

2.

__ + 2 = 2

3.

__ + 2 = 7

4.

__ + 18 = 18

5.

__ + 17 = 19

6.

__ + 3 = 20

7.

__ + 6 = 20

8.

__ + 9 = 20

9.

__ + 14 = 19

10.

__ + 5 = 7

11.

__ + 14 = 17

12.

__ + 7 = 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 7
  1. __ + 9 = 189
  2. __ + 2 = 20
  3. __ + 2 = 75
  4. __ + 18 = 180
  5. __ + 17 = 192
  6. __ + 3 = 2017
  7. __ + 6 = 2014
  8. __ + 9 = 2011
  9. __ + 14 = 195
  10. __ + 5 = 72
  11. __ + 14 = 173
  12. __ + 7 = 2013

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.