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GCF and LCM Greatest Common Factor  and  Least Common Multiple
LCM and GCF Least Common Multiple (LCM)- Of all common multiples of two or more numbers, the smallest multiple. Greatest Common Factor(GCF)-  The greatest common factor of two or more nonzero whole numbers.
 Using the Ladders methodFind the GCF of 16 and 20 16 20 2 ÷2 ÷2 2 10 8 GCF=2(2)=4                                 ÷2 ÷2 4 5
Using the Ladder methodFind the GCF of 24, 40, & 60 24 40 24 4 ÷4 ÷4 ÷4 2 10 6 6 GCF=4(2) = 8                                 ÷2 ÷2 ÷2 3 5 3
Using the Ladder methodFind the GCF of 28 and 42 28 42 2 GCF=2(7)=14                                ÷2 ÷2 7 21 14 ÷7 ÷7 2 3
Using the Ladder methodFind the LCM of 225 and 380 LCM=5(9)(5)(8)                                =1800 225 360 5 ÷5 ÷5 9 72 45 ÷9 ÷9 5 8
Using the Ladder methodFind the LCM of 25 and 35 LCM=5(5)(7) = 175 25 35 5 ÷5 ÷5 7 5
Using the Ladder methodFind the LCM of 24, 40, & 60 24 40 24 4 ÷4 ÷4 ÷4 2 10 6 6 ÷2 ÷2 ÷2 3 3 5 3 LCM =4(2)(3) (1)(5)(1) = 120 ÷3 ÷3 1 1 5

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Gcf and lcm

  • 1. GCF and LCM Greatest Common Factor and Least Common Multiple
  • 2. LCM and GCF Least Common Multiple (LCM)- Of all common multiples of two or more numbers, the smallest multiple. Greatest Common Factor(GCF)- The greatest common factor of two or more nonzero whole numbers.
  • 3. Using the Ladders methodFind the GCF of 16 and 20 16 20 2 ÷2 ÷2 2 10 8 GCF=2(2)=4 ÷2 ÷2 4 5
  • 4. Using the Ladder methodFind the GCF of 24, 40, & 60 24 40 24 4 ÷4 ÷4 ÷4 2 10 6 6 GCF=4(2) = 8 ÷2 ÷2 ÷2 3 5 3
  • 5. Using the Ladder methodFind the GCF of 28 and 42 28 42 2 GCF=2(7)=14 ÷2 ÷2 7 21 14 ÷7 ÷7 2 3
  • 6. Using the Ladder methodFind the LCM of 225 and 380 LCM=5(9)(5)(8) =1800 225 360 5 ÷5 ÷5 9 72 45 ÷9 ÷9 5 8
  • 7. Using the Ladder methodFind the LCM of 25 and 35 LCM=5(5)(7) = 175 25 35 5 ÷5 ÷5 7 5
  • 8. Using the Ladder methodFind the LCM of 24, 40, & 60 24 40 24 4 ÷4 ÷4 ÷4 2 10 6 6 ÷2 ÷2 ÷2 3 3 5 3 LCM =4(2)(3) (1)(5)(1) = 120 ÷3 ÷3 1 1 5