Grade 1 · Math · On Level
Free Missing Addends Within 20 worksheet - version 20
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-I55OT3-JDC3
1.__ + 10 = 19
2.__ + 12 = 14
3.__ + 0 = 20
4.__ + 13 = 15
5.__ + 4 = 20
6.__ + 9 = 20
7.__ + 16 = 20
8.__ + 6 = 20
9.__ + 0 = 15
10.__ + 7 = 19
11.__ + 11 = 20
12.__ + 0 = 12
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 20
- __ + 10 = 199
- __ + 12 = 142
- __ + 0 = 2020
- __ + 13 = 152
- __ + 4 = 2016
- __ + 9 = 2011
- __ + 16 = 204
- __ + 6 = 2014
- __ + 0 = 1515
- __ + 7 = 1912
- __ + 11 = 209
- __ + 0 = 1212
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.