CCSS.Math.7.EE.1,2(NQ.1a,1b) Properties of Operations

Dear Girls and Boys,

Today we are working with some PROPERTIES in math.  Properties are somewhat like the LAWS of math.  Once upon a time, several people got together and decided that there must be an order in math otherwise, there would be no consistency in getting the same answers.  This led to the birth of PROPERTIES! Simply a standard way of doing multiple operations.  The first property that you are very familiar with is ORDER OF OPERATIONS!  When you have a math sentence with many operations ( there are only 4 - addition, subtraction, multiplication or division ) you MUST adhere to the properties. In OOO ( Order of Operations) you start with working inside the parenthesis - then move to Exponents - the third step is either X or /  whichever one comes first in the sentence- and the last step is to solve +  or - ; again, whichever one you come to first.  You may recall the saying - Please Excuse My Dear Aunt Sally.  

There are several other operations that are also vital to know and understand.  The first being, COMMUTATIVE PROPERTY and the second one, ASSOCIATIVE PROPERTY.  
These properties are for both addition and multiplication.  The commutative property is when you switch the number around and associative property is when the parenthesis switches but the numbers stay put.  
Commutative  2 +3 = 3 + 2       2(3) = (3)2
Associative  2 +( 3 + 4) = (2 + 3) + 4 

This is Amy's kitty, Boris sitting in his cone of SHAME!!! He is not impressed!  
As always in MATH,
Mrs M