why is 7 times 8 not a number sentance

Is it because the sentence isn't complete?

7 * 8 = 56

It's not a number sentence because it doesn't have the answer. Ms. Sue wrote the full number sentence out for you.

It should be groups of not times

who do you make 7*8 true number sentence

135 and 9

ul..kjnj

mmmmmm beeettttttt. This is a load of rubbish