You want to use PEMDAS for this. <em>P</em>= arenthesis ( ) <em>E</em>= xponents a² <em>M</em>= ultiply × <em>D</em>= ivide ÷ <em>A</em>= dd + <em>S</em>= ubtract -
What you want to do is go in order and ask yourself as you go. Are there any <u><em>Parenthesis</em></u>? <em>No </em>Are there any <u><em>Exponents</em></u><em />? <em>No</em> Is there any <em /><u><em>Multiplication</em></u><em />? <em>Yes </em><em />Is there any <em><u>Division</u></em>? <em>No </em><em />Is there any <em><u>Addition</u></em>? <em>No </em><em />Is there any <em><u>Subtraction</u></em><u />? <em>Yes</em><em> </em><em />Thats when you stop and you multiply what you have in the PEMDAS. Top to bottom. 3x5 which gives you 15. Now you equation is 45-15. Thats when you subtract and you get your answer which is 30.
