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.

FactorsFactorsDivisibleDivisibleMonomialMonomial

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.

43543522 NONO

33 YESYES

55 YESYES

66 NONO

1010 NONO

Example 2:

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?

She should buy pens in packages of 6.

Example 3:

List all the factors of 64.1 x 64

2 x 32

4 x 16

8 x 8

1, 2, 4, 8, 16, 32, 64

Example 4:

Determine whether each expression is a monomial.

4(n + 3)

4n + 12

No! It has two terms.

Example 5:

Determine whether each expression is a monomial.

Yes! It has one term.

3

x

Page 150-151

Guided Practice

#’s 4-15

Pages 148-150 with someone at home and study

examples!

Read:

Homework: Pages 151-152

#’s 16-48 even

#’s 58-72

Lesson Check 4-1

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730

Lesson 4-1

Lesson Check 4-1