14 + 9 =

(a)  

28 - 10 =

(a)  

30 - 15 =

(a)  

30 · 100

(a)  

24 · 1.000 =

(a)  

11 · 4 =

(a)  

28 : 7 =

(a)  

24 : 8 =

(a)  

84 : 2 =

(a)