Addition Worksheet

Solve.

1 a. 2 + ______ + 1 = –7
1 b. ______ + (–6) + 2 = –1
2 a. ______ + (–9) + 9 = –1
2 b. ______ + (–1) + 4 = 1
3 a. (–8) + (–7) + ______ = –6
3 b. ______ + (–2) + (–2) = –11
4 a. 5 + (–9) + ______ = –1
4 b. (–5) + (–8) + ______ = –23
5 a. (–3) + 9 + ______ = –3
5 b. ______ + (–7) + (–3) = 0
6 a. ______ + (–5) + (–4) = –1
6 b. 4 + ______ + (–2) = 10
7 a. 1 + ______ + 2 = –3
7 b. ______ + (–5) + 5 = –4
8 a. (–5) + (–5) + ______ = –15
8 b. ______ + (–10) + (–1) = –5
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Answer Key

1 a. (–10)    
1 b. 3    
2 a. (–1)    
2 b. (–2)    
3 a. 9    
3 b. (–7)    
4 a. 3    
4 b. (–10)    
5 a. (–9)    
5 b. 10    
6 a. 8    
6 b. 8    
7 a. (–6)    
7 b. (–4)    
8 a. (–5)    
8 b. 6    

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