# Common Multiples

Students will learn about common multiples between two numbers. They will also find the lowest common multiple. They will have a worksheet to do.

First, you will copy the worksheet so that each one will have a copy.

Then, you will explain common multiples. Then, you will give them an example of common multiples and the lowest common multiple.

Example to write on the board:

What are the multiples of 4 and 6?

4, 8, 12, 16, 20, 24, 28, 32, 36, 40

6, 12, 18, 24, 30, 36, 42, 48, 54, 60

The common multiples are the multiples that 4 and 6 have in common. The lowest common multiple is the multiple that is the smallest number that each number has in common.

In the example above, the common multiples are 12, 24, and 36.

The lowest common multiple is 12. It is the smallest number that 4 and 6 have in common.

After you have explained how to do this, then you can give them the worksheet.
Worksheet - Common Multiples

Directions: First, you need to write the multiples of each number. Then, you need to find the common multiples. After that, you need to find the lowest common multiple.

1. 2 and 4

2. 5 and 7

3. 3 and 6

4. 7 and 8

5. 3 and 9

6. 5 and 8

7. 6 and 7

8. 3 and 4

9. 2 and 7

10. 9 and 10

11. 4 and 6

12. 8 and 9

13. 5 and 7

14. 4 and 10

15. 3 and 5

16. 4 and 7

17. 5 and 9

18. 6 and 9

19. 7 and 10

20. 8 and 9
Answer Sheet

1. 2 and 4 = The Lowest Common Multiple is 4.

2 = 2, 4, 6, 8, 10, 12, 14, 16, 18, 20

4 = 4, 8, 12, 16, 20, 24, 28, 32, 36, 40

2. 5 and 7 = The Lowest Common Multiple is 35.

5 = 5, 10, 15, 20, 25, 30, 35, 40, 45, 50

7 = 7, 14, 21, 28, 35, 42, 49, 56, 63, 70

3. 3 and 6 = The Lowest Common Multiple is 6.

3 = 3, 6, 9, 12, 15, 18, 21, 24, 27, 30

6 = 6, 12, 18, 24, 30, 36, 42, 48, 54, 60

4. 7 and 8 = The Lowest Common Multiple is 56.

7 = 7, 14, 21, 28, 35, 42, 49, 56, 63, 70

8 = 8, 16, 24, 32, 40, 48, 56, 64, 72, 80

5. 3 and 9 = The Lowest Common Multiple is 9.

3 = 3, 6, 9, 12, 15, 18, 21, 24, 27, 30

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

6. 5 and 8 = The Lowest Common Multiple is 40.

5 = 5, 10, 15, 20, 25, 30, 35, 40, 45, 50

8 = 8, 16, 24, 32, 40, 48, 56, 64, 72, 80

7. 6 and 7 = The Lowest Common Multiple is 42.

6 = 6, 12, 18, 24, 30, 36, 42, 48, 54, 60

7 = 7, 14, 21, 28, 35, 42, 49, 56, 63, 70

8. 3 and 4 = The Lowest Common Multiple is 12.

3 = 3, 6, 9, 12, 15, 18, 21, 24, 27, 30

4 = 4, 8, 12, 16, 20, 24, 28, 32, 36, 40

9. 2 and 7 = The Lowest Common Multiple is 14.

2 = 2, 4, 6, 8, 10, 12, 14, 16, 18, 20

7 = 7, 14, 21, 28, 35, 42, 49, 56, 63, 70

10. 9 and 10 = The Lowest Common Multiple is 90.

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

10 = 10, 20, 30, 40, 50, 60, 70, 80, 90, 100

11. 4 and 6 = The Lowest Common Multiple is 12.

4 = 4, 8, 12, 16, 20, 24, 28, 32, 36, 40

6 = 6, 12, 18, 24, 30, 36, 42, 48, 54, 60

12. 8 and 9 = The Lowest Common Multiple is 72.

8 = 8, 16, 24, 32, 40, 48, 56, 64, 72, 80

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

13. 5 and 7 = The Lowest Common Multiple is 35.

5 = 5, 10, 15, 20, 25, 30, 35, 40, 45, 50

7 = 7, 14, 21, 28, 35, 42, 49, 56, 63, 70

14. 4 and 10 = The Lowest Common Multiple is 20.

4 = 4, 8, 12, 16, 20, 24, 28, 32, 36, 40

10 = 10, 20, 30, 40, 50, 60, 70, 80, 90, 100

15. 3 and 5 = The Lowest Common Multiple is 30.

3 = 3, 6, 9, 12, 15, 18, 21, 24, 27, 30

5 = 5, 10, 15, 20, 25, 30, 35, 40, 45, 50

16. 4 and 7 = The Lowest Common Multiple is 28.

4 = 4, 8, 12, 16, 20, 24, 28, 32, 36, 40

7 = 7, 14, 21, 28, 35, 42, 49, 56, 63, 70

17. 5 and 9 = The Lowest Common Multiple is 45.

5 = 5, 10, 15, 20, 25, 30, 35, 40, 45, 50

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

18. 6 and 9 = The Lowest Common Multiple is 18.

6 = 6, 12, 18, 24, 30, 36, 42, 48, 54, 60

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

19. 7 and 10 = The Lowest Common Multiple is 70.

7 = 7, 14, 21, 28, 35, 42, 49, 56, 63, 70

10 = 10, 20, 30, 40, 50, 60, 70, 80, 90, 100

20. 8 and 9 = The Lowest Common Multiple is 72.

8 = 8, 16, 24, 32, 40, 48, 56, 64, 72, 80

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

Each problem is worth 5 points.

100 to 90 = A

89 to 80 = B

79 to 70 = C

69 to 60 = D

Below 60 = F

- Art
- Computer
- Games
- Geography
- Health
- History
- Language
- Literature
- Mathematics
- Music
- Other
- Physical Education
- Reading & Writing
- Science
- Social Studies
- Special Education

- M&m FractionsThis activity provides a fun and tangiable way for students to learn baisc fractions and be able to have a fun treat as a reward as well. The students will use the M&Ms to understand...
- Worksheet on Geometry TermsThe students are to unscramble the geometry terms that I have listed in the worksheet in this lesson. Then, they are to write out a definition for each of the...
- Beginning Multiplication Worksheet - Part TwoIn this lesson, students will have a worksheet of beginning multiplication problems. The problems are multiplying by threes and...
- Learning NumbersStudents will have a worksheet where they will draw circles according to the number they see. In Part Two, they will write the number of the circles in each...
- Writing Decimals in Word FormThis lesson is about writing decimals in word...