Common Core: 1.OA — Operations & Algebraic Thinking
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Name
Date
Score
/ 10
Bonds of 20 (Set A)
Directions: Find the missing number in each bond.
1.
? + 8 = 20
2.
? + 7 = 20
3.
14 + 6 = ?
4.
15 + 5 = ?
5.
15 + ? = 20
6.
16 + ? = 20
7.
? + 3 = 20
8.
? + 2 = 20
9.
18 + 2 = ?
10.
19 + 1 = ?
Great work — check your answers when you finish.
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