Study Guide #3 7N8,9.notebook
November 04, 2010
Do Now: Find the reasonable estimate for the expression. 15,784 + 11,122 = __________
Aim: How do you find the common factors and greatest common factor of two or more numbers? (7.N.8)
Aim: How do you find the common factors and greatest common factor of two or more numbers? (7.N.8)
Example # 1: What are the factors of 18?
Factors of a number divide into the number evenly (no remainder).
A number that is a factor of two or more numbers is a common factor of those numbers. The largest common factor of two or more numbers is called their greatest common factor (GCF).
GCF and LCM
Example # 2: What are the factors of 21?
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Study Guide #3 7N8,9.notebook
Example # 3: What is the greatest common factor of 16 and 20?
November 04, 2010
Example # 4: What is the greatest common factor of 10, 15, and 30?
What are the factors of 16? What are the factors of 10?
What are the factors of 15?
What are the factors of 20? What are the factors of 30?
The greatest common factor is ______.
List all the factors.
The GCF of 10, 15, and 30 is ___________.
Classwork
1. Factors of 7. ___________________________________________ 2. Factors of 14. ___________________________________________ 3. Factors of 10. ___________________________________________ 4. Factors of 21. ___________________________________________ 5. What is the greatest common factor of 10 and 14? _______________
Aim: How do you determine multiples and the least common multiple of two or more numbers? (7.N.9)
6. What is the greatest common factor of 7 and 24? ________________ 7. What are the common factors of 48 and 72? A. 1, 2, 4, 6, 8, 12 B. 1, 2, 3, 4, 6, 8 C. 1, 2, 3, 8, 9, 12, 24 D. 1, 2, 3, 4, 6, 8, 12, 24
GCF and LCM
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Study Guide #3 7N8,9.notebook
Aim: How do you determine multiples and the least common multiple of two or more numbers? (7.N.9)
November 04, 2010
Example # 2: What is the least common multiple of 3, 5, and 6? What are the first ten multiples of 3?
To find a Multiple of a number, multiply the number by any counting number. The product is a multiple. The least common multiple (LCM) of two numbers is the lowest number that is a multiple of both numbers.
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GCF and LCM
What are the first ten multiples of 5?
What are the first ten multiples of 6?
The LCM of 3, 5, and 6 is:______
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Study Guide #3 7N8,9.notebook
November 04, 2010
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swork ClasFind the LCM and GCF of the following numbers using the Tchart we learned today.
6 & 18 14 & 30 20 & 50 12 & 22 9 & 39
GCF and LCM
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Find the LCM and GCF of the following numbers using the Tchart we learned today.
36 & 81 42 & 98 64 & 16 8 & 32
44 & 99 15 & 18 24 & 36 30 & 40 75 & 90
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Study Guide #3 7N8,9.notebook
GCF and LCM
November 04, 2010
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