Common Denominator

Find the CD

100

1/3 and 1/12

12

200

1/6 and 2/3

6

300

3/4 and 3/5

20

400

7/9 and 5/6

18

500

8/11 and 4/7?

77

Write the CDs

100

4/15 and 1/3

4/15 and 5/15

200

5/8 and 1/6

30/48 and 8/48

300

3/7 and 2/3

9/21 and 14/21

400

3/5 and 1/2

6/10 and 5/10

500

5/6 and 3/4

10/12 and 9/12

Vocabulary

100

Name the first 10 multiples of 9.

9, 18, 27, 36, 45, 54, 63, 72, 81, 90

200

Name all of the factors of 13.

1, 13

300

Name all of the factors of 18.

1, 2, 3, 6, 9, 18

400

List the first six multiples for 4

4, 8, 12, 16, 20, 24

500

Name the first five multiples of 5. 

5, 10, 15, 20, 25