Least Common Multiple (LCM)
Least Common Denominator (LCD)
Addition with Like Fractions
Subtraction with Like Fractions
Addition with Unlike Fractions
100

What is the LCM of 5 and 10?

10

100

What is the LCD of these two fractions?

 1/2 and 1/4 

4

100

1/7 + 3/7 =

4/7

100

5/7 - 2/7 =

3/7

100

1/2 + 2/10 =

7/10

200

What is the LCM of 2 and 4?

4

200

What is the LCD of these two fractions?

2/3 and 1/6

6

200

5/9 + 2/9 =

7/9

200

7/11 - 4/11 =

3/11

200

1/2 + 1/4 = 

3/4

300

What is the LCM of 6 and 3?

6

300

What is the LCD of these two fractions?

3/4 and 3/8

8

300

1/5 + 2/5 =

3/5

300

2/23 - 1/23 =

1/23

300

2/5 + 1/2 =

9/10

400

What is the LCM of 4 and 5?

20

400

What is the LCD of these two fractions?

1/12 and 3/4

12

400

5/11 + 5/11 =

10/11

400

11/19 - 8/19 =

3/19

400

1/2 + 1/3 =

5/6

500

What is the LCM of 7 and 3?

21

500

What is the LCD of these two fractions?

2/7 and 1/3

21

500

4/17 + 3/17 =

7/17

500

19/20 - 8/20 =

11/20

500

5/9 + 1/4 =

29/36

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