Addition Worksheet

Solve.

1 a. 1 + (–9) + ______ = –18
1 b. (–5) + ______ + (–9) = –15
2 a. (–5) + (–1) + ______ = –10
2 b. ______ + 1 + (–8) = –13
3 a. ______ + (–5) + 7 = 10
3 b. ______ + (–9) + (–6) = –22
4 a. (–10) + ______ + 1 = –3
4 b. 4 + (–8) + ______ = 4
5 a. ______ + (–8) + (–3) = –16
5 b. 8 + (–7) + ______ = –8
6 a. ______ + (–8) + (–9) = –17
6 b. ______ + (–9) + (–9) = –26
7 a. ______ + (–10) + 2 = 2
7 b. (–7) + (–2) + ______ = –4
8 a. 10 + ______ + (–6) = –6
8 b. ______ + (–9) + 5 = 0
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Answer Key

1 a. (–10)    
1 b. (–1)    
2 a. (–4)    
2 b. (–6)    
3 a. 8    
3 b. (–7)    
4 a. 6    
4 b. 8    
5 a. (–5)    
5 b. (–9)    
6 a. 0    
6 b. (–8)    
7 a. 10    
7 b. 5    
8 a. (–10)    
8 b. 4    


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