Common Denominators

Find the LCD

100

Find the LCD for 1/2 and 1/4

4

200

What is the LCD for 1/6 and 2/3?

6

300

What is the LCD for 3/4 and 3/5?

20

400

What is the LCD for 7/9 and 5/6

18

500

What is the LCD for 8/11 and 4/7?

77

Find the LCD... again!

100

Find the LCD for 1/3 + 5/12

12

200

Find the LCD for 1/4 + 1/2

4

300

Find the LCD for 5/8 + 1/3

24

400

Find the LCD for 1/3 + 1/10

30

500

Find the LCD for 6/12 + 3/8

24

LCD Questions

100

To add or subtract fractions with different denominators, first find the ____ to make like fractions. 

LCD (LCM) or ECD

200

When you change 9 1/4 to 8 5/4 you are _______ the mixed number. 

Are you...

Finding the LCD (least common denominator)

OR 

Renaming?

Renaming

300

The least number that is a common multiple is the ______?

LCD (LCM)

400

List the first six multiples for 4

4, 8, 12, 16, 20, 24

500

Write the least common multiple for the numbers: 6, 4

12

Find the ECD

100

Find the ECD for 1/4 + 2/5

20

200

Find the ECD for 1/12 + 4/3

36

300

Find the ECD for 4/7 - 4/5

35

400

Find the ECD for 3/6 - 7/8

48

500

Find the ECD for 4/9 - 7/12

108

Find the ECD... again!

100

Find the ECD for 1/4 + 1/2

8

200

Find the ECD for 1/9 + 2/3

27

300

Find the ECD for 8/10 + 6/8

80

400

Find the ECD for 7/15 +1/2

30

500

Find the ECD for 3/13 + 6/5

65