# Order of Operations

**Topics:**Multiplication, Elementary arithmetic, Integer

**Pages:**2 (292 words)

**Published:**October 31, 2011

*** This will happen if we take this equation and NOT follow the Order of Operation*** 4+ 2 x 3 =

If I did not know the “rule” I would assume that I’d complete the problem this way 4 + 2= 6 x3 = 18 “oops I forgot my PEMDAS rule”

Let’s try this again:

4+ 2 x 3= okay I need to multiply first so I’ll fix this so I know what needs to be done first 4+ (2 x 3) = Ah ha! I get it now!

4+ (2x3) = 4+6 =

10!!!!!

Okay now….Lets make this harder!

42x 10+6-9=_____

I remember the rules by using PEMDAS which means I need to start with the ( ) first 42=2 x 10+6-9=____

Next I use the multiplication

2x10=20+6-9=____

Now since addition and subtraction are interchangeable, I can do either one. I’ll keep it simple: 26-9=17

Put it all together and you will have

(42)x 10+6-9=17

Well that’s great…but what if I don’t wanna use that rule? Lets find out! 42x 10+6-9=_____

Lets add the 10 and the 6 first…….which gives me

42x 16-9=____

Now let’s subtract 16-9

42x 7=____

Time for 4 divided by 2

2x7=____

14

Not the correct answer!!!! Booooo!

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