PencilGo
Sign in

Grade 1 · Math · On Level

Free Missing Addends Within 20 worksheet - version 14

Find the missing part in addition equations through 20. This printable version includes 12 grade-appropriate questions and a separate answer sheet.

Download free PDF

Missing Addends Within 20

Grade 1 · On-level practice · 12 questions · Version PG-1BJNW8G-JDC3

Free printable
1.__ + 8 = 20
2.__ + 16 = 20
3.__ + 11 = 13
4.__ + 5 = 20
5.__ + 1 = 20
6.__ + 15 = 17
7.__ + 5 = 9
8.__ + 1 = 13
9.__ + 3 = 10
10.__ + 4 = 20
11.__ + 20 = 20
12.__ + 6 = 20
Worksheet PDFAnswer keyCustomize

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 14
  1. __ + 8 = 2012
  2. __ + 16 = 204
  3. __ + 11 = 132
  4. __ + 5 = 2015
  5. __ + 1 = 2019
  6. __ + 15 = 172
  7. __ + 5 = 94
  8. __ + 1 = 1312
  9. __ + 3 = 107
  10. __ + 4 = 2016
  11. __ + 20 = 200
  12. __ + 6 = 2014

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.