5*3- what's the prodct I should be getting here?

Question

What it is?

Answer 1

Hi Ert;

I assume this is...

5*3 and that the - after this is a mistake.

5*3=15

because

5, three times, is...

5+5+5=15

and

3, five times, is...

3+3+3+3+3=15