Grade 1 · Math · On Level
Free Missing Addends Within 20 worksheet - version 18
Find the missing part in addition equations through 20. This printable version includes 12 grade-appropriate questions and a separate answer sheet.
Missing Addends Within 20
Grade 1 · On-level practice · 12 questions · Version PG-1EVJ4K4-JDC3
1.__ + 9 = 20
2.__ + 6 = 17
3.__ + 11 = 11
4.__ + 1 = 20
5.__ + 0 = 11
6.__ + 7 = 13
7.__ + 2 = 10
8.__ + 12 = 16
9.__ + 16 = 17
10.__ + 4 = 20
11.__ + 7 = 15
12.__ + 0 = 20
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 18
- __ + 9 = 2011
- __ + 6 = 1711
- __ + 11 = 110
- __ + 1 = 2019
- __ + 0 = 1111
- __ + 7 = 136
- __ + 2 = 108
- __ + 12 = 164
- __ + 16 = 171
- __ + 4 = 2016
- __ + 7 = 158
- __ + 0 = 2020
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.