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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 5x1=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 5x2 = 2x5 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) = 3x – 30 Distributive Property Name That Property! 3 + (4 + 5) = (3 + 4) + 5 Associative Property