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Multiplying and Dividing FractionsReporting Categories: Computation and Algebraic Relationships
ELPS: Learning 1A
TEKS 5.3JL, 5.1A
KWL
What I Know
K
What I Want to Know
W
What I Learned
L
Review: Multiplying Fraction
Review: Multiplying Fraction
Review: Multiplying Fraction
74
32
218
Review: Multiplying Fraction
Dividing FractionsJust like multiplying but with a flip.
Dividing Fractions
56
74
Dividing Fractions
First thing is to rewrite the math problem into a multiplication problem.
By first, writing the first fraction.
56
Dividing Fractions
Now we add the multiplication symbol.
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Dividing Fractions
This next part is a little tricky, we need to flip the second fraction.
This is called the reciprocal.
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Dividing Fractions
Now we can solve the original division problem in the form of a Multiplication problem by getting the reciprocal of the second fraction.
56
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2042
Lowest Terms for the Final Answer
Now we need to find the highest common divisor
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2042
1,2,4,5,10,201,2,3,6,7,14,21,42
Lowest Terms for the Final Answer
Now we need to find the highest common divisor
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2042
÷2÷2
1021
Real World
Examples:
Would like to know how much half of a ¾ cake is.
I have 2/3 of a tank of gas, how much can I use in the next 2 days.
Guided Practice
I have 2/3 of a tank of gas, how much can I use in the next 2 days.
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21
23
12
26
1,21,2,3,6
Guided Practice
I have 2/3 of a tank of gas, how much can I use in the next 2 days.
23
21
23
12
26÷2÷2
13
Individual Activity
WorksheetProblem #1 3/4 ÷ 5/8=Problem #2 1/12 ÷ 1/4 =Problem #3 7/12 ÷ 2/3 =
KWL
What I Know
K
What I Want to Know
W
What I Learned
L
Things to Keep in Mind
Rewrite division problem into a multiplication problem.
Second fraction does a flip, reciprocal.
If need be, lowest terms.
Extended Activity