Download presentation

Presentation is loading. Please wait.

Published byRoss Fox Modified about 1 year ago

1
Learn to write prime factorizations of composite numbers. 4.2 Factors and Prime Factorization

2
Vocabulary factor prime factorization Prime Number Brain Pop

3
Whole numbers that are multiplied to find a product are called factors of that product. A number is divisible by its factors = Factors Product 2 63 ÷ = 6÷2 = 3 6 is divisible by 3 and 2.

4
When the pairs of factors begin to repeat, then you have found all of the factors of the number you are factoring. Helpful Hint

5
Additional Example 1A: Finding Factors List all of the factors of the number 16. A = = is a factor. 2 is a factor. 16 = is not a factor. 4 is a factor. 5 is not a factor. 6 is not a factor. 7 is not a factor. 16 = and 2 have already been listed so stop here. The factors of 16 are 1, 2, 4, 8, and You can draw a diagram to illustrate the factor pairs.

6
Additional Example 1B: Finding Factors List all of the factors of the number 19. B = is not divisible by any other whole number. The factors of 19 are 1 and 19.

7
You can use factors to write a number in different ways. Factorization of Prime factorization A way to write a composite number as the product of prime factors. Notice that these factors are all prime.

8
Additional Example 2A: Writing Prime Factorizations Method 1: Use a factor tree. Choose any two factors of 24 to begin. Keep finding factors until each branch ends at a prime factor = = The prime factorization of 24 is , or Write the prime factorization of 24.

9
Check It Out: Example 2A Write the prime factorization of 28. Method 1: Use a factor tree. Choose any two factors of 28 to begin. Keep finding factors until each branch ends at a prime factor = = The prime factorization of 28 is 2 2 7, or

10
Prime factor this number 12 3 x 4 2 x 3 = 12 2 = 12 3 x 2 x 2 = 12 2 x 2 x 3 = 12

11
Prime factor this number 14 2 x 7= 14

12
Prime factor this number 18 3 x 6 2 x 3 = 18 2 = 18 3 x 2 x 3 = 18 2 x 3 x 3 = 18

13
Watch……. Factoring Brain Pop

Similar presentations

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google