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Bell Ringer

Learn to find Greatest Common Factor and Least Common Multiple easily with practice problems and tips. Improve your math skills today!

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Bell Ringer

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Presentation Transcript

  1. Bell Ringer

  2. Today’s Objectives • Today we are focusing on GCF and LCM • GCF = Greatest Common Factor • LCM= Least Common Multiple

  3. GCF…. IS ON THE LEFT! • Greatest • Largest • Maximum • Dividing something • Cutting something into pieces

  4. LCM… IS ALL OF THEM!! • Smallest • Minimum • First • Least • Next • Repeated over and over • Multiple items • When both will meet again • When both will be equal

  5. Remember… Divisibility Rules • When both numbers are EVEN… 2 will be able to go in both • When both numbers end in 0 or 5… 5 will be able to go in both

  6. Find the GCF of … Just Watch  15, 40

  7. Find the GCF of… 12, 20

  8. Find the GCF of… 9, 12

  9. Find the GCF of… 24, 36

  10. Find the LCM of… Just Watch  12, 18

  11. Find the LCM of… 8, 28

  12. Find the LCM of… 12, 15

  13. Find the LCM of… 30,42

  14. Word Problems… GCF or LCM? Jolynn is campaigning for class president. She wants to distribute 20 flyers and 16 buttons. She wants each classroom to have an identical set of campaign materials, without having any materials left over. What is the greatest number of classrooms Jolynn can distribute to?

  15. Word Problems… GCF or LCM? Matthew goes hiking every 12 days and swimming every 18 days. He did both kinds of exercise today. How many days from now will he go both hiking and swimming again?

  16. Word Problems… GCF or LCM? Ariel is making flower arrangements. He has 30 roses and 72 daises. If Ariel wants to make all the arrangements identical and have no flowers left over, what is the greatest amount of flower arrangements that he can make?

  17. iRespond Assessment

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