Question

18(10)what does this mean and how do I do it?

Answer 1

18(10) most commonly means to multiply 18 times 10. It's done as a replacement for 18 x 10 in higher levels of math because of variables, usually x, being used.

So 18 times 10 = 180

Answer 2

18 times 10= 180
That is usually what it means