15 + 4 = . . . .

(a)  

34 + 5 = . . . .

(a)  

53 + 14 = . . . .

(a)  

84 + 12 = . . . .

(a)  

22 + 27 = . . . .

(a)  

73 + 4 = . . . .

(a)  

40 + 20 = . . . .

(a)  

15 + 3 = . . . .

(a)  

92 + 6 = . . . .

(a)