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  • 1. What is the difference between prime and composite numbers?List the first six prime numbers.
  • 2. Prime #: only divisible by two numbers.Composite #: are divisible by three or more numbers.First six prime numbers: 2, 3, 5, 7, 11, 13
  • 3. Learning Target:Students will learn how to write whole numbers as the product of prime factors called prime factorization while reviewing the meaning of prime and composite numbers.
  • 4. Factors are the different groups that a number can be split into evenly.Ex. 27 factors are: 1,3,9,27 1 group of 273 groups of 99 groups of 327 groups of 1
  • 5. To find factors - I think about finding the pot of gold at the end of a rainbow.36: 1, 2, 3, 4, 6 , 9, 12, 18, 36
  • 6. Keep in mind your Divisibility Rules:2: # is even (ends in 0,2,4,6,8)3: if the sum of the digits is divisible by 3 5: if it ends in a 0 or 56: if it is even and divisible by 39: if the sum of the digits is divisible by 910: if it ends in a 0
  • 7. List all the factors of the number.818
  • 8. Answers:8: 1, 2, 4, 818: 1, 2, 3, 6, 9, 18
  • 9. How could you rewrite 42 as the product of only prime numbers?
  • 10. 42 = 2 x 3 x 7Prime Factorization: is when you write a number as the product of prime numbers.
  • 11. There are two diagrams you can use to write the factorization of a number.1. Factor Tree2. Ladder
  • 12. Factor TreePrime Factorization is 2x2x2x2x3 = 24x3482 242 2 122 2 2 62 2 2 2 3
  • 13. Ladder: 2, 3, 5, 7, 11, 132 482 242 122 63 3 1Prime factorization is 2x2x2x2x3 = 24x3
  • 14. Ladder:Ask each time is your number you have divisible by 2. Try 2 until it doesn’t work any more then try 3. Try 3 until it doesn’t work any more and so on. You are finished when you reach the number 1.
  • 15. Find the prime factorization of the number.90200
  • 16. Answers:90: 2 x 3 x 3 x 5 = 2 x 32 x 5200: 2 x 2 x 2 x 5 x 5 = 23 x 5
  • 17. Can you write whole numbers as the product of prime factors?Can you list factors of a number?