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

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

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

Property: Think DescribeExample Identity Property (of addition) Identity Property (of multiplication) Inverse Property (of addition) Inverse Property (of multiplication) 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 = 5 5 x 1 = (-3) = 0

Commutative Property Associative Property Distributive Property Property: Think DescribeExample Add or multiple in any order 5+2 = 2+5 5x2 = 2x5 When adding or multiplying, you can group in any order 2(3+4) = 2(3) + 2(4) a(b + c) = ab + ac

Practice with white boards

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

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

4 + 6 = 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! Name That Property!

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

3 + 2 = Commutative Property Name That Property!

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

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

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