Grade 1 · Math · On Level
Free Missing Addends Within 20 worksheet - version 10
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-1CNMB0C-JDC3
1.__ + 8 = 16
2.__ + 3 = 20
3.__ + 10 = 19
4.__ + 7 = 19
5.__ + 5 = 13
6.__ + 7 = 20
7.__ + 4 = 14
8.__ + 10 = 18
9.__ + 3 = 5
10.__ + 4 = 10
11.__ + 6 = 9
12.__ + 5 = 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 10
- __ + 8 = 168
- __ + 3 = 2017
- __ + 10 = 199
- __ + 7 = 1912
- __ + 5 = 138
- __ + 7 = 2013
- __ + 4 = 1410
- __ + 10 = 188
- __ + 3 = 52
- __ + 4 = 106
- __ + 6 = 93
- __ + 5 = 2015
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.