Prime And Composite Numbers Worksheet printable pdf download

Prime And Composite Numbers Worksheet

Chapter 14, Lesson 3

Reteach

Name

Date

Prime and Composite Numbers

CA Standards

NS 4.2, NS 4.1

You will ﬁ nd the factors of a prime number and the factors of a

composite number.

Step

To determine if 6 is prime or

Step

To determine if a number is

prime or composite, you can use counters

composite, use counters.

to make arrays or you can use divisibility

rules.

With 6 counters, you can make several

Step

To determine if 5 is prime or

arrays. 6 is a composite number because it

composite, use counters.

has more than 2 factors. These factors are

1, 2, 3 and 6.

With 5 counters, you can make only one

1 × 6 = 6

array. 5 is a prime number because it has

only two factors. These factors are 1 and 5.

2 × 3 = 6

1 × 5 = 5

In the table below, list the factors for each number. Use counters if you wish.

Tell if the number is prime or composite.

Number

Factors

Prime or Composite

Writing Math

Explain how you could use divisibility rules to

determine if 39 is prime or composite.

Reteach

Use with text pages 306–307.

Houghton Mifflin Company. .

Prime And Composite Numbers Worksheet