PencilGo
Sign in

Grade 1 · Math · On Level

Free Missing Addends Within 20 worksheet - version 16

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-1C3N3ME-JDC3

Free printable
1.__ + 2 = 20
2.__ + 2 = 10
3.__ + 1 = 20
4.__ + 0 = 10
5.__ + 0 = 20
6.__ + 2 = 14
7.__ + 3 = 20
8.__ + 0 = 9
9.__ + 12 = 18
10.__ + 12 = 20
11.__ + 0 = 13
12.__ + 5 = 17
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 16
  1. __ + 2 = 2018
  2. __ + 2 = 108
  3. __ + 1 = 2019
  4. __ + 0 = 1010
  5. __ + 0 = 2020
  6. __ + 2 = 1412
  7. __ + 3 = 2017
  8. __ + 0 = 99
  9. __ + 12 = 186
  10. __ + 12 = 208
  11. __ + 0 = 1313
  12. __ + 5 = 1712

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.