Grade 1 · Math · On Level
Free Missing Addends Within 20 worksheet - version 1
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-1MR7OTG-JDC3
1.__ + 15 = 18
2.__ + 18 = 18
3.__ + 7 = 9
4.__ + 7 = 18
5.__ + 11 = 11
6.__ + 5 = 20
7.__ + 17 = 18
8.__ + 4 = 5
9.__ + 14 = 15
10.__ + 9 = 20
11.__ + 2 = 20
12.__ + 14 = 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 1
- __ + 15 = 183
- __ + 18 = 180
- __ + 7 = 92
- __ + 7 = 1811
- __ + 11 = 110
- __ + 5 = 2015
- __ + 17 = 181
- __ + 4 = 51
- __ + 14 = 151
- __ + 9 = 2011
- __ + 2 = 2018
- __ + 14 = 206
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.