63 + 13 =

(a)  

54 - 14 =

(a)  

68 - 24 =

(a)  

30 · 500

(a)  

60 · 400 =

(a)  

12 · 5 =

(a)  

49 : 7 =

(a)  

48 : 2 =

(a)  

300 : 2 =

(a)