1. NOTES: Least Common Multiple Today, I will learn how to find the Lowest Common Multiple (LCM) for two numbers. I will do this by using the slide method.

2. I DO: Find the LCM of 6 and 20. Step 1: Set up the slide. Step 2: Find the factor for 6 and 20. (go back to step 1) Step 3: Once you get to 1, you’re DONE! Draw the ‘L.’ Step 4: Multiply all numbers inside the ‘L.’ 6 20 3 10 3 10 2x1 x 3 x 10 = 60 LCM = 60

3. We DO: Find the LCM of 12 and 30. Step 1: Set up the slide. Step 2: Find the Factor for 12 and 30 (go back to step 1) Step 3: Once you get to 1, you’re DONE! Draw the ‘L.’ Step 4: Multiply all numbers inside the ‘L.’ 12 30 6 15 2 5 2 5 2x3 x 1 x 2 x 5 = 60 LCM = 60

4. Let’s Do Find the LCM for 28 & 64. LCM is 448 GCF is 4

5. You Do Find the LCM for 24 & 30. LCM is 120 GCF is 6

6. NOTES: Least Common Multiple 4.8 “Special Rule” Today, I will learn how to find the Lowest Common Multiple (LCM) for three numbers. I will do this by using the slide method.

7. I DO: Find the LCM of 8, 9 and15. Step 1: Set up the slide. Step 2: Find the factor that goes into at least 2 of the 3 numbers. Step 3: Bring the loner down (go back to step 1) Step 4: Remember once you get to 1, you’re DONE! Draw the ‘L.’ Step 5: Multiply all numbers inside the ‘L.’ 8 9 15 3 5 8 3 5 3x1 x 8 x 3 x 5 = 360 LCM = 360

8. We DO: Find the LCM of 4, 7 and14. Step 1: Set up the slide. Step 2: Find the factor that goes into at least 2 of the 3 numbers. Step 3: Bring the loner down (go back to step 1) Step 4: Once you get to 1, you’re DONE! Draw the ‘L.’ Step 5: Multiply all numbers inside the ‘L.’ 4 7 14 2 7 1 1 2 1 1 2x7 x 1 x 2 x 1x1 = 28 LCM = 28

9. Notes: Greatest Common Factor 4.2 Today, we will use the slide method to find the GCF of two numbers. The GCF does not have a special rule. The factor needs to go into all numbers.

10. I DO: Find the GCF of 12 and 32. Step 1: Set up the slide. Step 2: Once you get to 1 you’re DONE! Step 3: Don’t forget to draw the ‘G.’ What do we do with the numbers in the ‘G’? 12 32 6 16 3 8 Multiply the numbers inside the G to get the GCF. 2 x 2 x 1 = 4 GCF = 4

11. WE DO: Find the GCF of 16 and 18. Step 1: Set up the slide. Step 2: Once you get to 1 you’re DONE Step 3: Don’t forget to draw the ‘G.’ What do we do with the numbers in the ‘G’? 16 18 8 9 Multiply the numbers inside the G to get the GCF. 2 x 1 = 2 GCF = 2

12. Let’s Do: Find the GCF of 78 and 6 Once you get to 1 you’re done Don’t forget to draw the ‘G’. 78 6 39 3 13 1 We multiply the numbers inside the ‘G’. 2 x 3 = 6 GCF = 6

13. You Do: Find the GCF of 15 & 81. GCF is 3 LCM is 405

14. Simplify Fraction 4.4 Today, I will use the slide to find the simplified fraction.

15. I do, Step 1: Set up the slide. Make sure to put the numerator (top #) first, then the denominator (bottom #) Step 2: Find a factor for 8 and 12. (go back to step 1) Step 3: Once you get to 1, you’re DONE! Step 4: Your simplified fraction is at the bottom

16. We do, Step 1: Set up the slide. Make sure to put the numerator (top #) first, then the denominator (bottom #) Step 2: Find a factor for 9 and 15. (go back to step 1) Step 3: Once you get to 1 as your only factor, you’re DONE! Step 4: Your simplified fraction is at the bottom

17. Let’s Do,

18. You do,