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Lesson 4-1 Pages 148-152
Factors and
Monomials
What you will learn!
1. How to determine whether
one number is a factor of
another.
2. How to determine whether
an expression is a
monomial.
Factors
Divisible
Monomial
What you really need to know!
Two or more numbers that are
multiplied to form a product are
called factors. Any number is
divisible by its factors. The
following rules can be used to
determine mentally whether a
number is divisible by 2, 3, 5, 6,
or 10.
What you really need to know!
A number is divisible by:
2 if the ones digit is divisible by 2.
3 if the sum of the digits is divisible by 3.
5 if the ones digit is 0 or 5.
6 if the number is divisible by 2 and by 3.
10 if the ones digit is 0.
Example 1:
Determine whether 435 is
divisible by 2, 3, 5, 6, or 10.
435
2
3
5
6
10
NO
YES
YES
NO
NO
Example 2:
She should buy pens in packages of 6.
Sonya is running for student council
president. She wants to give out
campaign flyers with a pen to each
student in the school. She can buy
“Vote for Sonya” pens in packages
of 5, 6, or 10. If there are 306
students in the school and she
wants no pens left over, which size
packages should she buy?
Example 3:
List all the factors of 64.
1 x 64
2 x 32
4 x 16
8x8
1, 2, 4, 8, 16, 32, 64
Example 4:
No! It has two terms.
Determine whether each
expression is a monomial.
4(n + 3)
4n + 12
Example 5:
Yes! It has one term.
Determine whether each
expression is a monomial.
x
3
Page 150-151
Guided Practice
#’s 4-15
Read:
Pages 148-150
with someone at
home and study
examples!
Homework: Pages 151-152
#’s 16-48 even
#’s 58-72
Lesson Check 4-1
Page
730
Lesson 4-1
Lesson Check 4-1