40 30=50 5;32 4=25 17;54 6=90 42; 8 6=90 42;7 5=70 2; 37 8=9 5.

Question

40 30=50 5;32 4=25 17;54 6=90 42; 8 6=90 42;7 5=70 2; 37 8=9 5.

Answer 1

40-30=50/5
32/4=25-17
54-6=90-42
8*6=90-42
7*5=70/2
37+8=9*5