Lesson 1 Prime Factors, GCF, LCM Mar14.notebook
March 15, 2016
1
Lesson 1 Prime Factors, GCF, LCM Mar14.notebook
Factors of 12:
March 15, 2016
1, 2, 3, 4, 6, 12
prime factors of 12
12 = 2 × 2 × 3, or 12 = 22 × 3
2 · 3 12 = 2 · 2 · 3, or 12 = 2
ç ç
2
Lesson 1 Prime Factors, GCF, LCM Mar14.notebook
Factor trees:
March 15, 2016
12
Product of prime factors of 12:
Prime factorization of 12:
3
Lesson 1 Prime Factors, GCF, LCM Mar14.notebook
March 15, 2016
List the prime factors of 40. factors of 40: prime factors of 40:
Write the prime factorization of 40.
4
Lesson 1 Prime Factors, GCF, LCM Mar14.notebook
March 15, 2016
Example 1 p. 135
ü
Check your understanding #1
List the first 10 prime numbers:
top paragraph p. 135
5
Lesson 1 Prime Factors, GCF, LCM Mar14.notebook
March 15, 2016
ç
6
Lesson 1 Prime Factors, GCF, LCM Mar14.notebook
March 15, 2016
7
Lesson 1 Prime Factors, GCF, LCM Mar14.notebook
March 15, 2016
Least Common Multiple (LCM) Example: Find LCM of 12 and 10. List of the multiples of both numbers: 12:
10:
Which is the first common on the list?
8
Lesson 1 Prime Factors, GCF, LCM Mar14.notebook
ü
March 15, 2016
Use Factor trees:
18
20
30
List the prime factors: 18: 20: 30:
LCM:
Try page 140 #10e
9
Lesson 1 Prime Factors, GCF, LCM Mar14.notebook
March 15, 2016
Try page 140 #10e
10
Lesson 1 Prime Factors, GCF, LCM Mar14.notebook
March 15, 2016
Word Problems
ü
Find LCM of 16 and 40
11
Lesson 1 Prime Factors, GCF, LCM Mar14.notebook
March 15, 2016
Find GCF of 40 and 16
12
Lesson 1 Prime Factors, GCF, LCM Mar14.notebook
March 15, 2016
Exercises p. 140 do odds only There will be a quiz (when)?
13