Grade 1 · Math · On Level
Free Missing Addends Within 20 worksheet - version 2
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-1NL6HWD-JDC3
1.__ + 1 = 20
2.__ + 18 = 20
3.__ + 20 = 20
4.__ + 5 = 9
5.__ + 8 = 11
6.__ + 3 = 17
7.__ + 17 = 20
8.__ + 4 = 5
9.__ + 6 = 15
10.__ + 1 = 14
11.__ + 16 = 20
12.__ + 2 = 18
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 2
- __ + 1 = 2019
- __ + 18 = 202
- __ + 20 = 200
- __ + 5 = 94
- __ + 8 = 113
- __ + 3 = 1714
- __ + 17 = 203
- __ + 4 = 51
- __ + 6 = 159
- __ + 1 = 1413
- __ + 16 = 204
- __ + 2 = 1816
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.