Lesson 8-1 - Math Slide Show

Lesson 8-1 (cont.)GCF - Greatest Common FactorFind the GCF of the following.20 242 10 2 122 52 •2 •5GCF = 2 •2 = 42 62 32 •2 •2 • 3GCF - Greatest Common FactorFind the GCF of the following.6m 2 9mn6 m 29 mn2 3 m m 3 3 m n2 • 3•m •m 3• 3•m •nGCF = 3•m = 3mFinding the GCF Using Upside-Down DivisionCommonFactors2 200 1802 100 905 50 452 10 3 95 3GCF = 2• 2•5GCF = 20Find the GCF using the technique described.Factor Trees Upside-Down Division96 240 2 96 2402 48 2 1202 48 1202 24 606 8 4 30 2 12 302 3 2 42 2 2 1536 152 52 2 3 52• 2• 2• 2• 2•3 GCF= 2• 2• 2• 2•32• 2• 2• 2• 3•5 GCF = 48GCF = 2 • 2• 2• 2•3GCF = 48GCF - Greatest Common FactorFind the GCF of the following mentally.1) 15x 2 y 12xy 3 3x yFind the missing factor.1) x 10 = (x 4 6)( x )2) 8a 4 3= (2a)( 4a )2)3)30a 2 b 42a 3 b 26a 2b14m 4 n 3 21m 5 n 27m 4 n23) 2x 2 y = (x)( 2xy )4) 36a 3 b 4 2 3= (9ab)( 4a b )5) 7x 4 y 3 = (−xy 2 3)( −7x y )6) −6h 2 k 3 2= (3hk)( −2hk )Algebra Slide Show: Teaching Made Easy As Pi, by James Wenk © 2010