Grade 1 · Math · On Level
Free Missing Addends Within 20 worksheet - version 9
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-1KJAV9O-JDC3
1.__ + 0 = 5
2.__ + 11 = 20
3.__ + 7 = 9
4.__ + 13 = 14
5.__ + 1 = 20
6.__ + 7 = 20
7.__ + 3 = 17
8.__ + 3 = 11
9.__ + 10 = 20
10.__ + 9 = 20
11.__ + 0 = 7
12.__ + 0 = 1
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 9
- __ + 0 = 55
- __ + 11 = 209
- __ + 7 = 92
- __ + 13 = 141
- __ + 1 = 2019
- __ + 7 = 2013
- __ + 3 = 1714
- __ + 3 = 118
- __ + 10 = 2010
- __ + 9 = 2011
- __ + 0 = 77
- __ + 0 = 11
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.