Factors of Composite Numbers

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Grade Level
Middle School
Subject
Mathematics
Length of Time
45 minutes to 1 hour
Description

This lesson is on factors of composite numbers. Students will write the factors of different numbers.

Goals

Students will learn:
About factors
To identify the factors of composite numbers

Materials Needed

You will need the worksheet that I have provided in this lesson.
Pencils and Erasers

Procedure

First, you will copy the worksheet I have included in this lesson. Then, you will explain what a factor is and show the students factors of a composite number before they do the worksheet.

A composite number has more than two factors.

Example: 18 is a composite number.

1 x 18 = 18

3 x 6 = 18

The factors of 18 = 1, 3, 6, and 18.

After you have gone over some examples of factors of composite numbers, then you can pass out the worksheet. Worksheet: Factors of Composite Numbers.

Directions: Write the factors of each composite number.

1. 16 =

2. 24 =

3. 35 =

4. 42 =

5. 50 =

6. 100 =

7. 63 =

8. 45 =

9. 22 =

10. 21 =

11. 12 =

12. 32 =

13. 8 =

14. 54 =

15. 48 =

16. 72 =

17. 81 =

18. 36 =

19. 75 =

20. 49 = Answers to Worksheet

1. 16 = 1, 2, 4, 8, 16

2. 24 = 1, 2, 4, 6, 12, 24

3. 35 = 1, 5, 7, 35

4. 42 = 1, 2, 6, 7, 21, 42

5. 50 = 1, 2, 25, 50

6. 100 = 1, 2, 4, 5, 10, 20, 25, 50, 100

7. 63 = 1, 7, 9, 63

8. 45 = 1, 5, 9, 45

9. 22 = 1, 11, 22

10. 21 = 1, 3, 7, 21

11. 12 = 1, 2, 3, 4, 6, 12

12. 32 = 1, 2, 4, 8, 16, 32

13. 8 = 1, 2, 4, 8

14. 54 = 1, 2, 6. 9, 27, 54

15. 48 = 1, 2, 3, 6, 8, 16, 24, 48

16. 72 = 1, 2, 8, 9, 36, 72

17. 81 = 1, 9, 81

18. 36 = 1, 2, 3, 4, 6, 9, 12, 18, 36

19. 75 = 1, 3, 5, 15, 25, 75

20. 49 = 1, 7, 49

Grading

Each question is worth five points.

100 to 90 = A

89 to 80 = B

79 to 70 = C

69 to 60 = D

Below 60 = F



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