McForse

Verified answer

(400-20)•2= 400*2 - 20*2 = 800 - 40 = 760
(25-9)•4 = 25*4 - 9*4 = 100 - 36 = 64
(80-1)•5 = 80*5 - 1*5 = 400 - 5 = 395
(20-1)•7 = 20*7 - 1*7 = 140 - 7 = 133