Common Core: 1.OA — Operations & Algebraic Thinking
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Name
Date
Score
/ 10
Number Bonds Within 20 (Set C)
Directions: Find the missing number in each bond.
1.
? + 7 = 16
2.
? + 10 = 17
3.
5 + 12 = ?
4.
2 + 16 = ?
5.
17 + ? = 19
6.
? + 5 = 19
7.
? + 8 = 20
8.
9 + 11 = ?
9.
2 + ? = 5
10.
1 + ? = 6
Great work — check your answers when you finish.
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