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10/22/09

### Transcript of Distributive Property 7th

• 1. 5 Minute Math1.) (-154) / 112.) (-96) / (-3)3.) 1124 / (-4)4.) (-78)/ (-2) / (-3)5.) 430 / (-5) / (-2)1

2. Distributive PropertyThe product of a and (b + c):a(b + c) = ab + ac(b + c)a = ba + ca The product of a and (b - c)a(b - c) = ab - ac(b - c)a = ba - ca2 3. Examples: 1.) 4(x + 2) = 4(x) + 4(2)4x + 82.) (x + 1)9 = 9(x) + 9(1) 9x + 93.) 4(x - 2) = 4(x) - 4(2)4x - 84.) (x - 4)6 = (x)6 - (4)66x - 243 4. Rewrite using the distributive property1.) 4(a + 9)4.) 3(a - 8) 2.) -6(12 + b)5.) 9(3 - b) 3.) (c + 1)(5)6.) (c - 12)(3) 4 5. Rewrite using the distributive property 1.) -3(a + 3) 2.) (3 + b)(-6) 3.) -4(c - 7) 4.) (5 - d)(-2) 5 6. Rewrite using the distributive property 6 7. Combining like termsLike terms: are terms that have the same variable raised to the same powerAn expression is simplified if it has no grouping symbols and if all the like terms have been combined.Example 1: 11d + 5 d= 16d Example 2: 17s - 8 - 12s= 5s-8 7 8. Try these:1.) -15m + 5 + 20m2.) 35y + 20y + 123.) 49n - 12a + 8n + 14a8 9. Homework: 7 Green Practice workbook 2.7 p.27-28 # 2 -22 even9