Grade 1 · Math · Building Confidence
Free Missing Addends Within 20 worksheet - version 3
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 · Building confidence · 12 questions · Version PG-I6EL0S-RBT8
1.__ + 7 = 20
2.__ + 9 = 10
3.__ + 3 = 20
4.__ + 5 = 20
5.__ + 19 = 20
6.__ + 2 = 20
7.__ + 0 = 20
8.__ + 1 = 20
9.__ + 10 = 19
10.__ + 1 = 2
11.__ + 6 = 20
12.__ + 4 = 10
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 3
- __ + 7 = 2013
- __ + 9 = 101
- __ + 3 = 2017
- __ + 5 = 2015
- __ + 19 = 201
- __ + 2 = 2018
- __ + 0 = 2020
- __ + 1 = 2019
- __ + 10 = 199
- __ + 1 = 21
- __ + 6 = 2014
- __ + 4 = 106
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.