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Multiplying & Dividing Mixed Numbers (M. Choice)
供稿人: Henry
(原作者: Cason)
Change a mixed number to an improper fraction
Whole number x denominator + numerator                       Denominator
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EX:  3 ⅛ = 3 x 8 + 1 
                        8
=
Convert an improper fraction to a mixed number.  
Find how many times the denominator goes into the
numerator.  The remainder is written as a fraction.
This is a division problem.
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EX:  20/3 = 20÷3
3 goes into 20, 6 times with 2 remainingthe mixed number would be 6 ⅔

Remember:  When multiplying and dividing fractions

change mixed to improper first.

8

 1

35

8

4

5

1

 12

35

x

9

2

7

1

8

15

 4

 

Remember:  Change the mixed number to improper

then use the butterfly method - only the wings!!

2

 1

 5

2

4

5

1

÷

2

2

  1

10

10

1

2

15

 1

 

Remember:  Change the mixed number to improper

then use the butterfly method - only the wings!!

6

4

5

3

1

 7

4

÷

1

57

 9

6

1

5

2

1

 

12

Remember:  Change the mixed number to improper

then use the butterfly method - only the wings!!

 1

2

25

8

 12

35

÷

10

2

2

1

8

15

 4

 

15 ¾

Remember:  When multiplying and dividing fractions

change mixed to improper first.

12

4

5

1

20

3

x

15

3

4

3

12

20

19

 

4

Remember:  When multiplying and dividing fractions

change mixed to improper first.

4

2

5

1

10

7

x

2

2

1

5

10

 7

 

Remember:  When multiplying and dividing fractions

change mixed to improper first.

2

7

1

 49

30

x

3

2

1

6

14

 1

 

1

Remember:  Change the mixed number to improper

then use the butterfly method - only the wings!!

 1

5

2

2

 4

5

  4

15

÷

6

2

3

1

 8

15

2

 5

 1

 
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