Question 11348
Order of operation: PEMDAS

Parenthesis, Exponents,(Multiplication/Division) then (Add/Subtract)


The reason (multiplication & division) and (add & subtract) are grouped is when those operations are next to each other you do the math from left to right. You do not necessarily do addition first if it is written next to subtraction. 

 >   2+3-4

     2+(-1)   * substraction first

     2-1 = 1

Thereore 2+3-4 =1