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Greatest Common Factor

Greatest Common Factor. By Monica Yuskaitis. Factor. A number that divides evenly into another. Factors of 24 are 1,2, 3, 4, 6, 8, 12 and 24. What are the factors of 9?. Factors of 9 are 1, 3 and 9. What are the factors of 10?. Factors of 10 are 1, 2, 5 and 10.

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Greatest Common Factor

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  1. Greatest Common Factor By Monica Yuskaitis

  2. Factor • A number that divides evenly into another. • Factors of 24 are 1,2, 3, 4, 6, 8, 12 and 24.

  3. What are the factors of 9? • Factors of 9 are 1, 3 and 9.

  4. What are the factors of 10? • Factors of 10 are 1, 2, 5 and 10.

  5. What are the factors of 7? • Factors of 7 are 1 and 7.

  6. What are the factors of 56? • Factors of 56 are 1, 2, 4, 7, 8, 14, 28, and 56.

  7. Common Factor • When two numbers have the same factor it is called a common factor. • A common factor of 12 and 6 is 3.

  8. Name a Common Factor of 9 and 27? 1, 3, 9

  9. Name a Common Factor of 4 and 8? 1, 2, 4

  10. Name a Common Factor of 4 and 8? 1, 2, 4

  11. Name a Common Factor of 15 and 30? 1, 3, 5, 15

  12. Name a Common Factor of 12 and 48? 1, 2, 3, 4, 6, 12

  13. Name a Common Factor of 7 and 21? 1, 7

  14. Name a Common Factor of 10 and 30? 1, 5, 10

  15. Name a Common Factor of 3 and 4? 1

  16. Simplest Form • When the only common factor of the numerator and denominator is 1, the fraction is in simplest form. 3 1 3 ÷ = 4 1 4

  17. Greatest Common Factor • The greatest common factor is the largest factor between two numbers. 12 = 1, 2, 3, 4, 6, 12 18 = 1, 2, 3, 6, 9, 18

  18. What is the Greatest Common Factor? 8 = 1, 2, 4, 8 12 = 1, 2, 3, 4, 6, 12

  19. What is the Greatest Common Factor? 8 = 1, 2, 4, 8 14 = 1, 2, 7,14

  20. What is the Greatest Common Factor? 6 = 1, 2, 3, 6 18 = 1, 2, 3, 6, 9, 15

  21. What is the Greatest Common Factor? 6 = 1, 2, 3, 6 12 = 1, 2, 3, 4, 6, 12

  22. What is the Greatest Common Factor? 8 = 1, 2, 4, 8 16 = 1, 2, 4, 8, 16

  23. What is the Greatest Common Factor? 8 = 1, 2, 4, 8 10 = 1, 2, 5, 10

  24. What is the Greatest Common Factor? 3 = 1, 3 6 = 1, 2, 3, 6

  25. What is the Greatest Common Factor? 4 = 1, 2, 4 6 = 1, 2, 3, 6

  26. What is the Greatest Common Factor? 7 = 1, 7, 21 = 1, 3, 7, 21

  27. What is the Greatest Common Factor? 15 = 1, 3, 5, 15 24 = 1, 2, 3, 8, 12, 24

  28. How to Find the Simplest Form of a Fraction • Find the greatest common factor of the numerator and the denominator and divide both the numerator and the denominator by that number. 12 6 2 ÷ = 18 6 3

  29. Simplify or Reduce This Fraction 12 6 2 ÷ = 18 6 3

  30. Simplify or Reduce This Fraction 9 3 3 ÷ = 21 3 7

  31. Simplify or Reduce This Fraction 12 4 3 ÷ = 20 4 5

  32. Simplify or Reduce This Fraction 10 5 2 ÷ = 15 5 3

  33. Simplify or Reduce This Fraction 10 2 5 ÷ = 16 2 8

  34. Simplify or Reduce This Fraction 12 4 3 ÷ = 16 4 4

  35. Simplify or Reduce This Fraction 3 3 1 ÷ = 12 3 4

  36. Simplify or Reduce This Fraction 2 2 1 ÷ = 8 2 4

  37. Simplify or Reduce This Fraction 2 2 1 ÷ = 4 2 2

  38. Simplify or Reduce This Fraction 6 3 2 ÷ = 9 3 3

  39. Simplify or Reduce This Fraction 6 2 3 ÷ = 8 2 4

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