Adding and Subtracting Fractions (Unlike Denominator)

LCD

100

1/2 and 1/4

4

200

2/5 and 3/10

10

300

2/3 and 1/5

15

400

3/6 and 4/5

30

500

7/8 and 2/10

40

Equivalent Fractions

100

1/2 = ?/4

2/4

200

3/5 = ?/10

6/10

300

1/3 = ?/12

4/12

400

2/4 = ?/20

10/20

500

3/24 = ?/72

9/72

Adding Fractions

100

1/5 + 1/10 = ?

3/10

200

2/3 + 2/6 = ?

6/6 or 1

300

2/6 + 3/4 = ?

13/12 or 1 1/12

400

2/7 + 3/5 = ?

31/35

500

5/11 + 1/4 = ?

31/44

Subtracting Fractions

100

2/3 - 1/2 = ?

1/6

200

9/10 - 2/5 = ?

5/10

300

7/12 - 3/6 = ?

1/12

400

2/3 - 5/12 = ?

3/12

500

24/30 - 6/15 = ?

12/30

Random Skill

100

What is the LCD of 

3/6 and 9/15

30

200

1/2 + 1/2 = ?

1

300

5/9 = ?/27

15/27

400

6/12 - 4/8 = 

0/24

500

15/24 - 7/36

31/72