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302A pp section 5.2 5.3 Operations of Fractions

302A pp section 5.2 5.3 Operations of Fractions -...

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Operations of Fractions If the GCF of two numbers is 13, what might the two numbers be? If the LCM of two numbers is 40, what might the two numbers be?

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Discuss Exploration 5.10 In your groups, compare answers to #7. Then, look at your class notes: do #2 on page 37. 5 minutes. Last comments?
Agenda Go over homework 5.2 Go over Explorations 5.11 and 5.12 Examine Exploration 5.10 and class notes Review for exam

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Exploration 5.12 Note: 7/13 ~ 1/2; 12/17 ~ 2/3 7/13 + 12/17 > 1 (E) 7/13 • 12/17 means less than 7/13 (B) 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 (D) a) 12/17 ÷ 7/13 means 12/17 • 13/7. This is like 2/3 • 2/1 which is 4/3. So (E). 0 7/13 12/17 1 A B C D E
More 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 E 2/11 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.

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More Practice Show a diagram and an equation. 1. Mina has 20 ounces of fruit juice. If each student is to get 2 1/2 ounces, how many students get juice? 0 4 8 12 16 20
More Practice 2. Tina had 3 1/2 pounds of spaghetti. If each person is going to eat 3/8 pound, how many people get a full serving? How much is left over?

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