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Updated sec. 5.4 Presentation Transcript

  • 1. Fill in the chart above.
  • 2. Learning Target:Students will learn how to find the least common multiple (LCM) of two or more numbers and they will learn the different strategies for doing so.
  • 3. These are the multiples of 2 and 3. (always start by multiplying by 1)The first three common multiples are 6, 12, 18.The least common multiple (LCM) is 6.
  • 4. Find two common multiples of the numbers.6, 18
  • 5. Answer: 6, 18 Common multiples: 18, 36
  • 6. Methods of finding the LCM1. List the multiples of each number2. Prime Factorization- Factor Tree3. Lemon CAKE
  • 7. Find the LCM of 3, 5.1. List the multiples of each number(do two multiples at a time)3: 3, 6, 9, 12, 155: 5, 10, 15, 20LCM: 15
  • 8. Find the LCM of 8, 10.2. Prime Factorization- Factor TreePrime factorization of8: 2, 2, 210:2, 5LCM: 2 x 2 x 2 x 5 = 40
  • 9. Find the LCM of 50, 90.3. Lemon CAKE2 50 905 25 45 5 9 = 450LCM: 2 x 5 x 5 x 9 = 450
  • 10. Lemon CAKE methodyou do the same steps as the CAKE method except that you multiply the left side and the bottom side of the cake (which makes a L shape) to find the LCM.
  • 11. Find the LCM of the numbers.8, 149, 15
  • 12. Answers:8, 14LCM: 569, 15LCM: 45
  • 13. Can you find the least common multiple (LCM) of two or more numbers?