1. 1-4 Properties of Real Numbers

2. Properties 1.Additive Identity – the sum of any number and zero is equal to the number. a + 0 = a 2.Multiplicative Identity – the product of a number and one is the number. a · 1 = a 3.Multiplicative Property of Zero – the product of a number and zero is zero. a · 0 = 0

3. 4.Multiplicative Inverse – any number times its reciprocal is equal to 1. 2 · 3 = 1 3 2 5.Additive Inverse – a number and its opposite are additive inverses of each other. A + (-a) = 0 6.Multiplicative Property of -1- any number times -1 is the numbers. Name the Property. 1. 42 · n = 42 2.m + 0 = m 3.n · 9 = 1

4. Evaluate. Name the property used in each step 1. 2(3 · 2 – 5) + 3 · 1/3

5. 2. ¼ (12 – 8) + 3 (15 ÷ 5 – 2)