10­12­10.notebook
October 12, 2010
10-12-10
Aim: SWBAT define and identify the commutative,
associative, and identity properties of addition and
multiplication.
Do Now: What does it mean to
commute?
associate?
keep your identity?
HW: Pg. 85 # 1-6, 16-21
Quiz Friday
Oct 5­5:49 PM
1
10­12­10.notebook
October 12, 2010
Commutative Property of Addition
a+b=b+a
Commutative Property of Multiplication
ab = ba
Oct 5­5:52 PM
2
10­12­10.notebook
October 12, 2010
Associative Property of Addition
a + (b + c) = (a + b) + c
Associative Property of Multiplication
a(bc) = (ab)c
Oct 5­5:53 PM
3
10­12­10.notebook
October 12, 2010
Identity Property of Addition
a+0=a
Identity Property of Multiplication
a(1) = a
Oct 5­5:52 PM
4
10­12­10.notebook
October 12, 2010
Sep 26­1:41 PM
5
10­12­10.notebook
October 12, 2010
Oct 12­10:57 AM
6