1. Least Common Multiple next © Math As A Second Language All Rights Reserved Using Prime Factors

2. © Math As A Second Language All Rights Reserved next Directions for the Teacher Review multiples and prime factors with your students. Students may follow along writing their answers on a piece of paper. Click the mouse when next appears on the slide.

3. 27 Find the least common multiple for… 9 = 3 × 3 × 3 = 3 × 3 3 3 3 3 3 × × = 27 next © Math As A Second Language All Rights Reserved

4. 12 Find the least common multiple for… 9 = 3 × 2 × 2 = 3 × 3 3 3 2 3 2 × × × = 36 next © Math As A Second Language All Rights Reserved

5. 8 Find the least common multiple for… 20 = 2 × 2 × 2 = 2 × 2 × 5 2 2 2 2 2 5 × × × = 40 next © Math As A Second Language All Rights Reserved

6. 14 Find the least common multiple for… 21 = 7 × 2 = 7 × 3 7 7 2 3 × × = 42 next © Math As A Second Language All Rights Reserved

7. 45 Find the least common multiple for… 15 = 5 × 3 × 3 = 5 × 3 5 5 3 3 3 × × = 45 next © Math As A Second Language All Rights Reserved

8. 25 Find the least common multiple for… 10 = 5 × 5 = 5 × 2 5 5 5 2 × × = 50 next © Math As A Second Language All Rights Reserved

9. 12 Find the least common multiple for… 15 = 3 × 2 × 2 = 3 × 5 3 3 2 5 2 × × × = 60 next © Math As A Second Language All Rights Reserved

10. 30 Find the least common multiple for… 20 = 5 × 2 × 3 = 5 × 2 × 2 5 5 2 2 2 × × × = 60 next 3 © Math As A Second Language All Rights Reserved

11. 20 Find the least common multiple for… 15 = 5 × 2 × 2 = 5 × 3 5 5 2 3 2 × × × = 60 next © Math As A Second Language All Rights Reserved

12. 24 Find the least common multiple for… 36 = 2 × 2 × 2 × 3 = 2 × 2 × 3 × 3 2 2 2 2 2 3 3 × × × × 3 = 72 next © Math As A Second Language All Rights Reserved

13. 25 Find the least common multiple for… 15 = 5 × 5 = 5 × 3 5 5 5 3 × × = 75 next © Math As A Second Language All Rights Reserved

14. 42 Find the least common multiple for… 28 = 7 × 2 × 3 = 7 × 2 × 2 7 7 2 2 2 × × × = 84 next 3 © Math As A Second Language All Rights Reserved

15. 30 Find the least common multiple for… 18 = 2 × 3 × 5 = 2 × 3 × 3 2 2 3 3 3 × × × = 90 next 5 © Math As A Second Language All Rights Reserved

16. 27 Find the least common multiple for… 12 = 3 × 3 × 3 = 3 × 2 × 2 3 3 3 2 3 next © Math As A Second Language All Rights Reserved × × × × = 108 2

17. 27 Find the least common multiple for… 36 = 3 × 3 × 3 = 3 × 3 × 2 × 2 3 3 3 3 3 2 2 next © Math As A Second Language All Rights Reserved × × × × = 108

18. 24 Find the least common multiple for… 15 = 3 × 2 × 2 × 2 = 3 × 5 3 3 2 5 2 × × × × 2 = 120 next © Math As A Second Language All Rights Reserved

19. 16 Find the least common multiple for… 36 = 2 × 2 × 2 × 2 = 2 × 2 × 3 × 3 2 2 2 2 3 3 × × × × 2 × = 144 next 2 © Math As A Second Language All Rights Reserved

20. 56 Find the least common multiple for… 63 = 7 × 2 × 2 × 2 = 7 × 3 × 3 7 7 2 3 3 × × × × 2 × = 504 next 2 © Math As A Second Language All Rights Reserved