Addition Worksheet

Solve.

1 a. 1 + (–8) + ______ = –4
 
 
1 b. (–9) + (–4) + ______ = –12
 
 
2 a. ______ + (–2) + (–2) = 3
 
 
2 b. 1 + (–4) + ______ = 1
 
 
3 a. (–3) + (–5) + ______ = –12
 
 
3 b. ______ + (–9) + (–2) = –5
 
 
4 a. ______ + (–6) + (–1) = –11
 
 
4 b. ______ + (–3) + 4 = 4
 
 
5 a. ______ + (–8) + 1 = 2
 
 
5 b. 10 + ______ + (–7) = 5
 
 
6 a. (–7) + ______ + 5 = 5
 
 
6 b. (–3) + ______ + (–7) = –16
 
 
7 a. (–10) + ______ + 8 = –10
 
 
7 b. 6 + (–10) + ______ = 6
 
 
8 a. 5 + (–2) + ______ = 4
 
 
8 b. ______ + (–3) + 9 = 10
 
 
9 a. ______ + 3 + (–7) = –2
 
 
9 b. ______ + (–5) + 5 = –9
 
 
10 a. (–8) + ______ + (–4) = –21
 
 
10 b. (–3) + ______ + (–5) = –16
 
 
Page 2

Answer Key

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

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