Adding/Subtracting Fractions w/ Unequal Denominators

Simplifying Fractions

100

Simplify: 8/24

1/3

200

Simplify: 9/12

3/4

300

Simplify: 15/25

3/5

400

Simplify: 12/48

1/4

500

Simplify: 26/65

2/5

Find the LCM

100

What would the LCM be for two fractions with denominators of 4 and 5?

LCM: 20

200

What would the LCM be for two fractions with denominators of 10 and 5?

LCM: 10

300

What would the LCM be for two fractions with denominators of 3 and 8?

Common Denominator: 24

400

What would the LCM be for 5/6 and 4/9

Common Denominator: 18

500

Find the LCM for 7/22 and 5/8. 

LCM: 88

Adding/Subtracting Mixed Numbers

100

1 1/5 + 2 3/10

3 1/2

200

1 1/6 + 2 2/3

3 5/6

300

5 1/3 + 4 5/12

9 9/12   or 9 3/4

400

10 2/5 - 7 2/15

3 4/15

500

5 5/12 - 4 6/12

11/12

Adding Fractions w/unequal denominators

100

ADD: 1/2 + 1/4

3/4

200

ADD: 6/9 + 1/3

9/9 = 1 whole!

300

ADD: 5/10 + 2/5

9/10

400

1/6 + 2/3

5/6

500

ADD: 4/5 + 5/10

1 3/10

Subtracting Fractions w/unequal denominators

100

SUBTRACT: 7/12 - 3/6

1/12

200

SUBTRACT: 4/12 - 1/6

2/12 = 1/6

300

SUBTRACT: 7/8 - 2/4

3/4

400

SUBTRACT: 2/3 - 3/18

1/2

500

SUBTRACT: 

15/16 - 3/4

3/16