Simple math quiz:

30•5=
24•8=
56+24=
87-39=

30•5 = 150

24•8 = 192

56+24 = 80

87-39 =48

Explanation:

you multiply ,, add ,, or subtract

a) 30 x 5 = 150

b) 24 x 8 = 192

c) 56 + 24 = 80

d) 87 - 39 = 48

Explantion:

For the first 2 you multiply

The third one you add

And for the last one you subtract.

the answer is a) to be able to obey them.