Lesson 5­2 Multipying Two Fractions Day 1.notebook
November 30, 2016
Warm Up:
Multiply. Write each answer in simplest
form.
1.
2.
3.
4.
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Lesson 5­2 Multipying Two Fractions Day 1.notebook
November 30, 2016
Agenda:
1. Focus Question
2. Notes on Lesson 5­2 Multiplying
Two Fractions
3. Independent Practice: Lesson 5­2
Worksheets
2
Lesson 5­2 Multipying Two Fractions Day 1.notebook
November 30, 2016
Focus Question:
Is the product of two proper
fractions greater than the fractions
being multiplied?
Explain.
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Lesson 5­2 Multipying Two Fractions Day 1.notebook
November 30, 2016
Lesson 5 ­ 2 Multiplying Two Fractions
You can use a model to multiply two
fractions.
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Lesson 5­2 Multipying Two Fractions Day 1.notebook
November 30, 2016
Lesson 5 ­ 2
Multiplying Two Fractions
Each square below represents 1 whole.
Write a multiplication equation for the
following model.
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Lesson 5­2 Multipying Two Fractions Day 1.notebook
November 30, 2016
Lesson 5 ­ 2 Multiplying Two Fractions
Example 1: Write a multiplication equation for each
of the following models.
a.)
b.)
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Lesson 5­2 Multipying Two Fractions Day 1.notebook
November 30, 2016
Lesson 5 ­ 2 Multiplying Two Fractions
General Rule:
equation ­
When
multiplying two fractions:
1. Multiply the fraction's numerators to
find the numerator of the product.
2. Multiply the fraction's denominators to
find the denominator of the product.
3. If necessary, rewrite the product in
simplest form.
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Lesson 5­2 Multipying Two Fractions Day 1.notebook
November 30, 2016
Lesson 5 ­ 2 Multiplying Two Fractions
Multiply using the General Rule:
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Lesson 5­2 Multipying Two Fractions Day 1.notebook
November 30, 2016
Lesson 5 ­ 2 Multiplying Two Fractions
Example 2: Multiply each of the following.
a.)
b.)
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Lesson 5­2 Multipying Two Fractions Day 1.notebook
November 30, 2016
Lesson 5 ­ 2 Multiplying Two Fractions
Example 2: Multiply each of the following.
c.)
d.)
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Lesson 5­2 Multipying Two Fractions Day 1.notebook
November 30, 2016
Lesson 5 ­ 2 Multiplying Two Fractions
When multiplying two fractions, there are
two ways you can use to write the
product in simplest form.
1. Simplify after multiplying.
2. Simplify before multiplying.
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Lesson 5­2 Multipying Two Fractions Day 1.notebook
November 30, 2016
Lesson 5 ­ 2 Multiplying Two Fractions
Simplify after
multiplying.
Simplify before
multiplying.
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Lesson 5­2 Multipying Two Fractions Day 1.notebook
November 30, 2016
Lesson 5 ­ 2 Multiplying Two Fractions
Example 3: Find the area, in square miles, of a
rectangular city neighborhood shown in the
diagram below.
Remember: you can simplify any numerator with any denominator before multiplying
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Lesson 5­2 Multipying Two Fractions Day 1.notebook
November 30, 2016
Focus Question:
Is the product of two proper
fractions greater than the fractions
being multiplied?
Explain.
When multiplying a fraction by a fraction, the product is always smaller!!
Think ­ "It is a piece of a piece"
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