Steps
Subtracting fractions w/ unlike denominators
Adding and subtracting mixed numbers w/ unlike denominators
Vocabulary
100

What is the first step when solving adding and subtracting fractions with unlike denominators?

Find a common denominator.

100

1         1

____ + ____ =

2          4

3

__

4

100

1         1

____ - ___ =

2         4

1

___

4

100

3          2

____ +  ___ =

4          3

17

____

12

100

What is a denominator?

The number below the line in a fraction.

200

What is the second step when adding and subtracting fractions with unlike denominators?

Create equivalent fractions

200

1          2

____ + ___ =

6           3

5

___

6

200

2          1

____ - ___ =

3         6

3

_____

6

200

1         5

____ +  ___ =

4         12

8

______

12

200

What is a numerator?

The number above the line in a fraction.

300

What is the third step when adding and subtracting fractions with unlike denominators?

300

1         3

____ + ___ =

5         10

5

____

10

300

1         1

____ - ___ =

5         10

1

_____

10

300

2          4

____ +   ___ =

4           16

12

____

16

300

What does equivalent mean?

Equal in value or the same in value.

400

What is the fourth step when adding and subtracting fractions with unlike denominators?

Simplify or reduce

400

6          2

____ + ___ =

12         6

2

_____

12

400

2         2

____ - ___ =

4         8

2

___

8

400

3          4

____ -   ___ =

5          15

5

____

15

400

What does simplify mean?

To reduce a fraction to it's simplest form or make the fraction as small as possible.

500

What is the fifth step with adding or subtracting fractions with unlike denominators?

500

2         7

____ + ___ =

7          14

11

_____

14

500

4         1

____ - ___ =

6         12

7

___

12

500

2          2

____ -    ___ =

7          21

4

_____

21

500

What is a common denominator?

When the bottom number of the fraction is the same for both fractions.