MyMathKidK-8 Curriculum
Common Core: 1.OA
Answer Key
Grade 1 • number-bonds • Medium

Bonds of 20 (Set B)

Practice making 20 different ways

10 problems

1.
20?7
ans
? + 7 = 20
2.
?146
ans
14 + 6 = ?
3.
?155
ans
15 + 5 = ?
4.
2015?
ans
15 + ? = 20
5.
2016?
ans
16 + ? = 20
6.
20?3
ans
? + 3 = 20
7.
20?2
ans
? + 2 = 20
8.
?182
ans
18 + 2 = ?
9.
?191
ans
19 + 1 = ?
10.
201?
ans
1 + ? = 20
Math Worksheets for Kids • Worksheet #bonds-of-20-b