156 x 14 = (a)  

712 $$\div$$   7 = (a)  

784 $$\div$$  22 = (a)  

509 X 84 = (a)  

55 X 45 = (a)  

43 875 - 16 923 = (a)  

41 664 - 3 189 =

(a)  

2 301 + 567 + 1 258 = (a)  

1 049 + 855 + 1904 = (a)