Greatest Common Factor and Least Common Multiples GCF and LCM - PowerPoint PPT Presentation

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Greatest Common Factor and Least Common Multiples GCF and LCM

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  1. Greatest Common Factor and Least Common MultiplesGCF and LCM

  2. What is the difference between a factor and a multiple?

  3. Factor:An integer that divides evenly (no remainder) into a numberFactors of 6 are: 1, 2, 3, 6

  4. Multiple:The product of a number and any natural numberSome multiples of 6: 6, 12, 18, 24……

  5. Give me an example of a factor of 15

  6. Give me an example of a multiple of 15

  7. How would you find the GCF of 60 and 96?

  8. You simply write out all the factors for each number. Then find the greatest number. I like to circle the numbers by using columns.

  9. List the factors of 60:1,2,3,4,5,6,10,12,15,20,30,60List the factors of 961,2,3,4,6,8,12,16,24,32,48,96find the largest factor - 12

  10. Find the GCF of 36 and 24

  11. Find the LCM of 12 and 18

  12. Multiples of 12 are…12,24,36,48,60,72,….Multiples of 18 are…18,36,54,72,90,108,…The smallest multiple the 2 numbers have in common is the least common multiple.

  13. Find the LCM of 18 and 12