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Evaluate the following and find the absolute
value. Then identify whether your solution is a
prime or composite number. If it is composite,
find the prime factorization:
1. |-3|
2. |-5 + 20|
3. |6-7|
Pop Notebook Quiz!
1) What does it mean to say 4 is a factor of 16?
2) What components make up an expression?
3) How is an expression different from an
equation?
4) In the chart we made on types of numbers,
what type of numbers were included in the
inner most circle?
5) What are the steps (name at least 3) to
evaluating the prime factorization of a
number.
Greatest Common Factor
• Find the biggest number you can think of that
goes in evenly to both:
16
15
9
and
and
and
???
36
45
22
Cornell Notes
• Greatest Common
Factor
Ex: 24 and 36
• the largest integer that
divides without
remainder into a set of
integers
-The biggest number that
goes in evenly to both
24 and 36 is 12.
Cornell Notes
• Factoring Expressions
• Use prime factorization
to determine a product
of primes for
coefficients
• Write out each variable
in the expression
Ex: 16x²y²
2*2*2*2*x*x*y*y
Cornell Notes
• GCF of expressions
• Same as GCF of
numbers!
Ex: 16x²y and 24xy
-The GCF of 16 and 24 is 8
-The GCF of x²y and xy is
xy
-The total GCF is 8xy
Practice-3 Tasks
1) With partner: Create 15 sets of numbers and
find GCF-quiz each other!
a. 5 pairs of numbers
b. 5 triples
c. 5 quadruples
2) Factor the expressions on the board
3) Find the GCF of the expressions on the board