Finding Factors

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Grade Level

• Middle School

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Subject

• Mathematics

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Length of Time

• 1 Hour

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Description

• In this lesson, students will find the factors of the numbers listed in the worksheet.

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Goals

• Students will learn:
  
  * About factors
  

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Materials Needed

• * The worksheet I have included in this lesson
  
  * Pencils and erasers
  

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Procedure

• First, you will copy the worksheet so that each student will have a copy.
  
  Then, you will explain about factors. Factors are numbers that you multiply together to get a product.
  Here's an example: Factors of 24
  
  12 x 2 = 24
  6 x 4 = 24
  1 x 24 = 24
  3 x 8 = 24
  Factors: 1, 2, 3, 4, 6, 8, 12, 24
  
  After that, you will pass out the worksheets so the students can work on them independently.
  
  
  
  Worksheet - Finding Factors
  
  Directions: Find the factors of the following numbers.
  
  
  1. 25 =
  
  2. 75 =
  
  3. 190 =
  
  4. 145 =
  
  5. 27 =
  
  6. 523 =
  
  7. 45 =
  
  8. 55 =
  
  9. 19 =
  
  10. 49 =
  
  11. 98 =
  
  12. 100 =
  
  13. 50 =
  
  14. 48 =
  
  15. 36 =
  
  16. 65 =
  
  17. 84 =
  
  18. 72 =
  
  19. 60 =
  
  20. 125 =
  
  
  
  
  
  Answer Sheet
  
  1. 25 = 1, 5, 25
  
  2. 75 = 1, 3, 5, 15, 25, 75
  
  3. 190 = 1, 2, 5, 10, 19, 38, 95, 190
  
  4. 145 = 1, 5, 29, 145
  
  5. 27 = 1, 3, 9, 27
  
  6. 523 = 1, 523
  
  7. 45 = 1, 3, 5, 9, 15, 45
  
  8. 55 = 1, 5, 11, 55
  
  9. 19 = 1, 19
  
  10. 49 = 1, 7, 49
  
  11. 98 = 1, 2, 49, 98
  
  12. 100 = 1, 2, 4, 5, 10, 20, 25, 50, 100
  
  13. 50 = 1, 2, 5, 10, 25, 50
  
  14. 48 = 1, 2, 3, 4, 6, 8, 12, 16, 24, 48
  
  15. 36 = 1, 2, 3, 4, 6, 9, 12, 18, 36
  
  16. 65 = 1, 5, 13, 65
  
  17. 84 = 1, 2, 3, 4, 6, 7, 12, 28, 42, 84
  
  18. 72 = 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 72
  
  19. 60 = 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60
  
  20. 125 = 1, 5, 25, 125
  
  

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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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