Chapter 5.1 LCM.notebook
December 03, 2015
HW Solutions
1
Chapter 5.1 LCM.notebook
December 03, 2015
Warm­up Scientific Notation
1. Write 7,980,000,000 in scientific notation
2. (3.6x10­6)(1.7x10­9)
3. (2.1x10­4)(3.2x103)
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Chapter 5.1 LCM.notebook
December 03, 2015
Least Common Multiple
Multiples of 4: 4, 8, 12, 16, 20, 24.....
Multiples of 6: 6, 12, 18, 24, 30.....
What is the LCM of 6 and 5?
What is the LCM of 3 and 18?
What is the LCM of 6 and 8?
Tiles
What about 14 and 63? Put on white board.
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Chapter 5.1 LCM.notebook
December 03, 2015
Using prime factorization to help you with the LCM.
What is the prime factorization of 14 and 63?
14
63
We always pick the numbers with the highest exponents
Let's try the same thing but with 9 and 12
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Chapter 5.1 LCM.notebook
December 03, 2015
This is Pre­Algebra so there's got to be some letters (variables) and exponents...
What is the LCM of 6a2 and 18a3
What about 8m2 and 14m4?
And 12x, 15xy?
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Chapter 5.1 LCM.notebook
December 03, 2015
How can we use the LCM? We we can use it to determine which values are larger.
What is larger Which is larger What about and
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Chapter 5.1 LCM.notebook
December 03, 2015
What if the fractions didn't have the same denominator? What if we were trying to determine if or is greater?
What about 7