Be seated before the bell rings Be prepare

Be seated before the bell rings Be prepare : 1) Have your homework out to be stamp - Due pg 10 ; 12 -21, 26 -39 HW: pg 17; 18 -23, 35 -37 Glue in notes Quiz – Thursday DESK homework Warm-up (in your notes) All bags, purse, etc off desk

Ways to think of set notation Interval Notation Roster Notation Can only do lists Set-Builder Can only do Notation infinite intervals Can do BOTH

Warm-up 8 -12 Write down in the think column of what you think each properties of real number is.

Property: Identity Property (of addition) Identity Property (of multiplication) Inverse Property (of addition) Inverse Property (of multiplication) Think Describe When you add and it keeps the nuber the same. identity is 0 What you multiply by a number so it keeps its identity. multiplicative identity is 1 When you add a number to its inverse it equals 0 When you multiply a number by its inverse it equals 1 Example 5+0=5 5 x 1=5 3 + (-3) = 0

Property: Think Describe Commutative Property Add or multiple in any order Associative Property When adding or multiplying, you can group in any order Distributive Property Example 5+2 = 2+5 5 x 2 = 2 x 5 2(3+4) = 2(3) + 2(4) a(b + c) = ab + ac

Practice with white boards

Name That Property! (9 + 8) + 7 = 9 + (8 + 7) The Associative Property of Addition It is the only addition property that has parentheses.

Name That Property! 12 + 0 = 12 The Identity Property of Addition It is the only addition property that has two addends and one of them is a zero.

Name That Property! 9+7=7+9 The Commutative Property of Addition It is the only addition property that has numbers that change places.

Name That Property! 4+6=6+4 The Commutative Property of Addition Numbers change places.

Name That Property! 3+0=3 The Identity Property of Addition See the zero?

Name That Property! (4 + 3) + 2 = 4 + (3 + 2) The Associative Property of Addition It has parentheses!

Name That Property! a+b=b+a The Commutative Property of Addition Moving numbers!

(a + b) + c = a + (b + c) The Associative Property of Addition Parentheses! B A C

Name That Property! 3+2=2+3 Commutative Property

Name That Property! 10(1/10) = 1 Multiplicative Inverse Property

Name That Property! 3(x – 10) = 3 x – 30 Distributive Property

Name That Property! 3 + (4 + 5) = (3 + 4) + 5 Associative Property