Multiplying Fractions

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# Multiplying Fractions - PowerPoint PPT Presentation

Multiplying Fractions. Fraction with a Fraction. 1. Multiply numerators 2. multiply denominators 3. reduce. Try Some!. = 8 35. x. 4 2 7 5. = 3 = 1 90 30. 2. 1 3 9 10. x. = 6 = 3 32 16. 3 . 6 1 8 4. x.

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### Multiplying Fractions

Fraction with a Fraction

1. Multiply numerators

2. multiply denominators

3. reduce

Try Some!
• = 8

35

x

• 42

7 5

• = 3 = 1

90 30

• 2. 13

9 10

x

• = 6 = 3

32 16

• 3. 61

8 4

x

Multiplying Fractions and Whole Numbers

1. Put a 1 under the whole number

2. multiply numerators

3. multiply denominators

4. Reduce or make into mixed number

Try Some!

5

• = 15

4

• = 33

4

x

• 3

4

1

8

• = 16

7

• = 22

7

• 2. 2

7

x

1

2

• = 18

12

• = 16 = 1 ½

12

• 3. 9

12

x

1

Multiplying Fractions and Mixed Numbers

1. Change mixed number into an improper fraction

2. multiply numerator

3. multiply denominator

4. Reduce or make into mixed number

Try Some!
• 3

4

• 40

7

8

28

2

7

5

5 =

7

x

• = 120

28

4

4

x

• 3

4

• 1

8

• 56

9

• 2. 1

8

6

2 =

9

x

• = 56

72

7

9

x

• 10

13

• 7

3

31

39

• 3.10

13

2

1 =

3

x

• = 70

39

1

x

Multiplying Mixed Numbers

1. Change BOTH mixed numbers into an improper fraction

2. multiply numerator

3. multiply denominator

4. Reduce or make into mixed number

Try Some!

1.

• 19

5

• 23

8

37

40

4

5

2

7 =

8

x

• = 437

40

10

3

x

2.

• 24

15

• 29

6

9

15

4

5 =

6

x

• = 696

80

56

80

7

10

1

8

8

x

44

2

24

3.

• 23

3

• 46

8

2

3

5

6 =

8

x

• = 1058

24

7

x

1

12

44