Math Teacher
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Greatest Common Factor
Greatest Common Factor-Division Ladder Example
Greatest Common Factor-Factor Tree Example
Tuesday
Prime Factorization: Factor Tree
Find the Prime Factorization of 84 using a Factor Tree.
*Make branches like a tree to separate the composite number until all prime numbers are listed.
*Circle the prime numbers in the tree
Image attributed to http://eteamscc.com/wp-content/uploads/2014/11/Factor-Tree.gif
*Make branches like a tree to separate the composite number until all prime numbers are listed.
*Circle the prime numbers in the tree
Image attributed to http://eteamscc.com/wp-content/uploads/2014/11/Factor-Tree.gif
Prime Factorization: Division Ladder
Find the prime factorization of 84 using a Division Ladder. *Use an upside down Division Bar
2 [_84
2 [_42
3 [_21
7
The prime factorization is 2 X 2 X 3 X 7
You can also write this using an exponent: 22 x 3 x 7
2 [_84
2 [_42
3 [_21
7
The prime factorization is 2 X 2 X 3 X 7
You can also write this using an exponent: 22 x 3 x 7
Prime Factorization Vocabulary
CLASS NOTES
FACTOR - a whole number that divides into a nonzero whole number with no remainders.
Example: factors of 12: 1,2,3,4,6,12 CFU1
COMPOSITE NUMBER - a whole number greater than1 with more than 2 factors.
Example: 25 is composite because it has 3 factors 1,5 and 25
PRIME NUMBER - a whole number with exactly 2 factors, 1 and the number itself.
The whole numbers 0 and 1 are neither prime nor composite.
PRIME FACTORIZATION - writing a composite number as a product of prime numbers.
FACTOR - a whole number that divides into a nonzero whole number with no remainders.
Example: factors of 12: 1,2,3,4,6,12 CFU1
COMPOSITE NUMBER - a whole number greater than1 with more than 2 factors.
Example: 25 is composite because it has 3 factors 1,5 and 25
PRIME NUMBER - a whole number with exactly 2 factors, 1 and the number itself.
The whole numbers 0 and 1 are neither prime nor composite.
PRIME FACTORIZATION - writing a composite number as a product of prime numbers.
Prime Factorization "Do Now"
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Prime Numbers to 100
Blue numbers are Prime numbers
*There are 25 Prime Numbers between 1 and 100
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