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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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View Full Document 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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View Full Document 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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View Full Document 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
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?
0
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This note was uploaded on 11/29/2009 for the course HIST 110 taught by Professor Staff during the Spring '08 term at University of Arizona Tucson.
 Spring '08
 STAFF

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