Hello Bloggers! Today seems like the perfect day to write a blog post, I am just finishing up many big projects with school, doing homework, and of course watching the Twins vs Miami! :) I have been working on chapter five in our books and the chapter is about Understanding Integer Operations and Properties. I don't know about any of you, but I always was really good at solving the long problems that you had to go in a certain order.
I believe that I was good at it for one reason only. PEMDAS. For you who don't know this analogy I am going to try and explain it to you! In elementary when we learned order of operations we learned, "Please Excuse My Dear Aunt Sally." P=parentheses. E=Exponents. M=Multiplication. D=Division. A=Addition. S=Subtraction. This phrase teaches kids to remember the order of operations with a saying, which is great for the memory! I use it even to this day, in our last assignment I said in my head, please excuse my dear aunt sally. It is funny that it still is in my head after all these years.
For instance, if you had the following problem: 2-(4+3)-6/2= ?
2-7-3= -8
*You would start by adding 3+4 because they are in the parentheses, then divide 6 by 2. You are then left with, 2-7-3, which equals -8. Another tricky thing they do in long math problems or even short ones is Absolute Value. The absolute value bars make whats inside positive.
| –3 | = 3 - | –3 | = -3
The reason why one is positive and the other is negative is because on the second problem, there is a - sign outside the bars, which makes whatever comes out negative!
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