Parentheses in number sentence (30-15)*2=

Answer 1

(30-15)*2=

15 * 2 = 30

PEMDAS
http://www.mathsisfun.com/operation-order-pemdas.html

Answer 2

PEMDAS is often used, but doesnt help if you dont know what it means. So Ill tell you :) Parenthases, exponants, multiplication, division, addition, subtraction