13+21

(a)  

80-35

(a)  

67+26

(a)  

2+5

(a)  

13+8

(a)  

67-17

(a)  

3+69

(a)  

54-26

(a)  

7+7

(a)  

115-35

(a)  

23+25

(a)  

20:4

(a)  

5+6

(a)  

10+9

(a)  

11+5

(a)  

8+9

(a)  

73+6

(a)  

28+8

(a)  

6+9

(a)  

83

(a)  

100

(a)  

102

(a)  

120

(a)  

124

(a)