pre algebra lesson 6 3
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8/12/2019 Pre Algebra Lesson 6 3
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6-3 Multiplying Fractions
Objective: Multiply fractions.
8/12/2019 Pre Algebra Lesson 6 3
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5-Minute Check
Estimate each product or quotient.
1. 53.64 x 8.95
8/12/2019 Pre Algebra Lesson 6 3
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8/12/2019 Pre Algebra Lesson 6 3
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5-Minute Check
Estimate each product or quotient.
1. 53.64 x 8.95
2. 7/15 x 24
8/12/2019 Pre Algebra Lesson 6 3
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5-Minute Check
Estimate each product or quotient.
1. 53.64 x 8.95
2. 7/15 x 24 12
8/12/2019 Pre Algebra Lesson 6 3
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5-Minute Check
Estimate each product or quotient.
1. 53.64 x 8.95
2. 7/15 x 24
3. 104 x 11/20
8/12/2019 Pre Algebra Lesson 6 3
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5-Minute Check
Estimate each product or quotient.
1. 53.64 x 8.95
2. 7/15 x 24
3. 104 x 11/20 104
8/12/2019 Pre Algebra Lesson 6 3
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5-Minute Check
Estimate each product or quotient.
1. 53.64 x 8.95
2. 7/15 x 24
3. 104 x 11/20
4. 164.36 ÷ 81
8/12/2019 Pre Algebra Lesson 6 3
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5-Minute Check
Estimate each product or quotient.
1. 53.64 x 8.95
2. 7/15 x 24
3. 104 x 11/20
4. 164.36 ÷ 81 2
8/12/2019 Pre Algebra Lesson 6 3
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5-Minute Check
Estimate each product or quotient.
1. 53.64 x 8.95
2. 7/15 x 24
3. 104 x 11/20
4. 164.36 ÷ 81
5. 2/9 ÷ 4/15
8/12/2019 Pre Algebra Lesson 6 3
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5-Minute Check
Estimate each product or quotient.
1. 53.64 x 8.95
2. 7/15 x 24
3. 104 x 11/20
4. 164.36 ÷ 81
5. 2/9 ÷ 4/15 5/6
8/12/2019 Pre Algebra Lesson 6 3
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8/12/2019 Pre Algebra Lesson 6 3
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6-3 Multiplying Fractions
Example 1
Solve x = 3/2 * 7/9
8/12/2019 Pre Algebra Lesson 6 3
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6-3 Multiplying Fractions
Example 1
Solve x = 3/2 * 7/9
= 3/2 * 7/9
8/12/2019 Pre Algebra Lesson 6 3
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6-3 Multiplying Fractions
Example 1
Solve x = 3/2 * 7/9
= 3/2 * 7/9
=3*7
/2*9
8/12/2019 Pre Algebra Lesson 6 3
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6-3 Multiplying Fractions
Example 1
Solve x = 3/2 * 7/9
= 3/2 * 7/9
=3*7
/2*9= 21/18 or 11/6
8/12/2019 Pre Algebra Lesson 6 3
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6-3 Multiplying Fractions
Example 1
Solve x = 3/2 * 7/9
= 3/2 * 7/9
=3*7
/2*9= 21/18 or 11/6
If the fractions have common factors inthe numerators and denominators,
simplify before you multiply.
8/12/2019 Pre Algebra Lesson 6 3
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8/12/2019 Pre Algebra Lesson 6 3
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6-3 Multiplying Fractions
Example 2
Solve z = 11/16 * 4/7
= 11/16 * 4/7
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6-3 Multiplying Fractions
Example 2
Solve z = 11/16 * 4/7
= 11/16 * 4/7
=11*4
/16*7
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6-3 Multiplying Fractions
Example 2
Solve z = 11/16 * 4/7
= 11/16 * 4/7
=11*4
/16*7 The GCF of 4 and 16 is 4. Divide 4 and 16 by 4.
8/12/2019 Pre Algebra Lesson 6 3
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6-3 Multiplying Fractions
Example 2
Solve z = 11/16 * 4/7
= 11/16 * 4/7
=11*4
/16*7= 11*1/4*7 or 11/28
The GCF of 4 and 16 is 4. Divide 4 and 16 by 4.
8/12/2019 Pre Algebra Lesson 6 3
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6-3 Multiplying Fractions
Observations:
What happens when you multiply any number by a
fraction that is less than one?
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6-3 Multiplying Fractions
Observations:
What happens when you multiply any number by a
fraction that is less than one?
What happens when the multiplier is greater than one?
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6-3 Multiplying Fractions
Assignment: 18 - 40 Even, 41 – 54 All