Download presentation

Presentation is loading. Please wait.

Published byAmanda Stanley Modified over 9 years ago

1
5-1& 5-2 Prime Factors and Greatest Common Factors Vocab: Prime Numbers(5-1) A whole number with exactly 2 factors (1 and itself) ex 17: 1,17 1 is not Prime!! Composite Numbers(5-1) A whole number with more than 2 factors ex 8: 1,2,4,8 Prime Factorization: Write a composite number as a product of only primes. 18 = 2x3x3 Greatest Common factor: The largest factor 2 or more numbers share (will divide into both numbers evenly)

2
To find the GCF using lists of factors Write all the factors of the following numbers 20 : 24: 20:1, 2, 4, 5, 10, 20 24:1, 2, 3, 4, 6, 8, 12, 24 5 10 20 124124 3 6 8 24 12 Factors of 20 Factors of 24 The greatest common factor(GCF) is 4

3
Find the GCF of 6 and 12 6:1,2,3,6 12:1,2,3,4,6,12 1 2 3 4 6 12 The GCF is 6

4
Find GCF with Prime Factors Find the Prime factors of 45 and 36 36 = 6 x 6 = 2x3x2x3 ←all primes =2x2x3x3←rewrite in order 45 = 9 X 5 = 3x3x5←all primes (in order) So 36 = 2x2x3x3 45 = 3x3x5 3x 3 is on both lists so the GCF is 3x3 =9

5
Find the GCF of 30 a 2 and 18 a 3 b 30 a 2 = 2x3x5xaxa 18a 3 b = 2x3x3xaxaxaxb 2x3xaxa is on both lists so the GCF is 2x3xaxa=6a 2

6
Period 6 & 7 5-1/199/33-35,50,51 5-2/205-206/26-33,39-44,47 Periods 1, 3, & 8 5-2/205-206/9-19 o,39-44,46,47

Similar presentations

© 2024 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google