Order operations

12 + 6 x 5  $\div$  3 = (a)  

200 $\div$   5 + 15 x 13 = (a)  

132 $\div$  12 + 20 x 16 = (a)  

120 x 1400

(a)  

24 000 : (a)   = 200

360 x (a)   = 18 000

Find the product of 145 and 40

(a)  

Divide 45 000 by 300

(a)  

The value of 4 + 4 x 4 - 4  $\div$  4 = (a)  

What is the missing number?
8 000  $\div$   (a)   = 20