1. 7-2 Prime Factorization
Math Notes
Number Sense 1.4

2. Consider this...

3. Consider this...
Prime Factorization is similar to the video
game Asteroids.

4. Consider this...
Prime Factorization is similar to the video
game Asteroids.
A spaceship shoots a large asteroid.

5. Consider this...
Prime Factorization is similar to the video
game Asteroids.
A spaceship shoots a large asteroid.
The asteroid breaks into smaller pieces.

6. Consider this...
Prime Factorization is similar to the video
game Asteroids.
A spaceship shoots a large asteroid.
The asteroid breaks into smaller pieces.
The spaceship shoots those and they
break into even smaller pieces.

12. Is 24 a prime?
24

13. Is 24 a prime?
Is 6 a prime?
24 Is 4 a prime?
6 4

14. Is 24 a prime?
Is 6 a prime?
24 Is 4 a prime?
6 4
3 2 2 2

15. Is 24 a prime?
Is 6 a prime?
24 Is 4 a prime?
6 4
3 2 2 2
If you’re left
with ALL prime...

16. Is 24 a prime?
Is 6 a prime?
24 Is 4 a prime?
6 4
3 2 2 2
If you’re left ...your answer is
with ALL prime... 2x2x2x3

18. Is 18 a prime?
18

19. Is 18 a prime?
Is 9 a prime?
18 Is 2 a prime?
9 2

20. Is 18 a prime?
Is 9 a prime?
18 Is 2 a prime?
9 2
2 is prime.

21. Is 18 a prime?
Is 9 a prime?
18 Is 2 a prime?
9 2
2 is prime.
3 3

22. Is 18 a prime?
Is 9 a prime?
18 Is 2 a prime?
9 2
2 is prime.
3 3
If you’re left
with ALL prime...

23. Is 18 a prime?
Is 9 a prime?
18 Is 2 a prime?
9 2
2 is prime.
3 3
If you’re left ...your answer is
with ALL prime... 3x3x2

25. Is 40 a prime?
40

26. Is 40 a prime?
Is 10 a prime?
40 Is 4 a prime?
10 4

27. Is 40 a prime?
Is 10 a prime?
40 Is 4 a prime?
10 4
5 2 2 2

28. Is 40 a prime?
Is 10 a prime?
40 Is 4 a prime?
10 4
5 2 2 2
If you’re left
with ALL prime...

29. Is 40 a prime?
Is 10 a prime?
40 Is 4 a prime?
10 4
5 2 2 2
If you’re left ...your answer is
with ALL prime... 2x2x2x5