11 x 0.53

(a)  

 $4^3$  

(a)  

18 x 0.001

(a)  

12 x 9

(a)  

 $\sqrt{169}$  

(a)  

64  $\div$  0.8

(a)  

27  $\div$  0.2

(a)  

 $\sqrt{144}$    $\div$  2

(a)  

5.03  $\div$  50.3

(a)