Subtracting Mixed Numbers with Common Denominators

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Example 1 Simple Mixed Number Subtraction

 3

5

 2

 3
 

1

2

 ---

 -

 ---

 =

 ---

8
 

8
 

8

The fraction 2/8 does need to be reduced.

2 2    1
--- ---  =  ---
8 2   4

The final answer will be 1 and 1/4 after you have reduced.

Not all subtraction of mixed numbers with common denominators will have to be reduced. Only reduce the fraction if possible.

Example 2 Simple Mixed Number Subtraction without Reducing

 3

5

 2

 3
 

1

2

 ---

 -

 ---

 =

 ---

7
 

7
 

7

The fraction 2/7 does not need to be reduced to lower terms.

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