Slide 1Exploration 5.12More PracticeExploration 5.13Exploration 5.13Exploration 5.13Add and subtract: find a common denominator.The Area Model and MultiplicationThe Area Model and MultiplicationThe Area Model and MultiplicationWarm-UpExploration 5.12 (p. 114)Continue working on Part I (we started this in class on the PowerPoint last week)Exploration 5.12Note: 7/13 ~ 1/2; 12/17 ~ 2/3•7/13 + 12/17 > 1 •7/13 • 12/17 means less than 7/13 •7/13 ÷ 12/17 means 7/13 • 17/12. This is like 1/2 • 3/2 = 3/4, which is greater than 12/17, so a) 12/17 ÷ 7/13 means 12/17 • 13/7. This is like 2/3 • 2/1 which is 4/3. So 0 7/13 12/17 1 A B C D EMore Practice•Given: •4/9 + 2/11•4/9 - 2/11•4/9 • 2/11•4/9 ÷ 2/11 0 2/11 4/9 1 A B C D E2/11 is much less than 5/9, so D.2/11 is less than 2/9, so C.4/9 • 2/11 is less than both of these fractions, so B.4/9 • 11/2 is much greater than 1, so E.Exploration 5.13•#2 •3/4 + 1/6 = 11/123/41/6Exploration 5.13•#4 •12 • 3/4 = 9 (Note: this is operator)Exploration 5.13•#5 •12 - 3/4 = 11 1/4Add and subtract: find a common denominator.•3/8 + 5/12 2/15 - 1/20•LCD = 24 LCD = 60•3 • 3 + 5 • 2 2 • 4 - 1 • 38 • 3 12 • 2 15 • 4 20 • 3•9/24 + 10/24 8/60 - 3/60•19/24 5/60 or 1/12The Area Model and Multiplication•Use an area model to show 2/3 • 4/5The Area Model and Multiplication•Use an area model to show 2/3 • 4/5The Area Model and Multiplication•Use an area model to show 4/5 • 1 2/3•Multiplication
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