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Name

Name

Date

Date

4–1

4

4–1

4–1

4–1

4 4 4

Name

Name

Name

Name

Name

Name

Date

Date

Date

Date

Date

Date

Prime Numbers

Prime Numbers

Prime Numbers

Prime Numbers

Prime Numbers

Prime Numbers

Prime Numbers

Prime Numbers

A number whose only factors are 1 and itself is called

⫻ ⫻

⫽ ⫽

1

2

2

a

prime number

prime number

. The number 2 is a prime number because

⫻ ⫻ ⫻ ⫻ ⫻ ⫻

⫽ ⫽ ⫽ ⫽ ⫽ ⫽

A number whose only factors are 1 and itself is called

A number whose only factors are 1 and itself is called

A number whose only factors are 1 and itself is called

the only factors of 2 are 1 and 2.

1 1 1

2 2 2

2 2 2

prime number

prime number

prime number

prime number

prime number

prime number

a a a

. The number 2 is a prime number because

. The number 2 is a prime number because

. The number 2 is a prime number because

⫻ ⫻

⫽ ⫽

1

4

4

The number 4 is not a prime number. The number 4 has three

the only factors of 2 are 1 and 2.

the only factors of 2 are 1 and 2.

the only factors of 2 are 1 and 2.

⫻ ⫻ ⫻ ⫻ ⫻ ⫻

⫻ ⫻

⫽ ⫽ ⫽ ⫽ ⫽ ⫽

⫽ ⫽

2

2

4

factors, 1, 2, and 4.

1 1 1

4 4 4

4 4 4

⫻ ⫻ ⫻ ⫻ ⫻ ⫻

⫽ ⫽ ⫽ ⫽ ⫽ ⫽

The number 4 is not a prime number. The number 4 has three

The number 4 is not a prime number. The number 4 has three

The number 4 is not a prime number. The number 4 has three

2 2 2

2 2 2

4 4 4

factors, 1, 2, and 4.

factors, 1, 2, and 4.

factors, 1, 2, and 4.

Think about the definition of prime number

Think about the definition of prime number

s and different wa

s and different wa

ys to make

ys to make

pr pr

oducts to solve the follo

oducts to solve the follo

wing pr

wing pr

oblems.

oblems.

Think about the definition of prime number

Think about the definition of prime number

Think about the definition of prime number

Think about the definition of prime number

Think about the definition of prime number

Think about the definition of prime number

s and different wa

s and different wa

s and different wa

s and different wa

s and different wa

s and different wa

ys to make

ys to make

ys to make

ys to make

ys to make

ys to make

pr pr pr pr pr pr

oducts to solve the follo

oducts to solve the follo

oducts to solve the follo

oducts to solve the follo

oducts to solve the follo

oducts to solve the follo

wing pr

wing pr

wing pr

wing pr

wing pr

wing pr

oblems.

oblems.

oblems.

oblems.

oblems.

oblems.

List the numbers from 3 through 10. Which numbers are prime? Which are not

1. 1.

1. 1. 1. 1. 1. 1.

prime? How do you know?

List the numbers from 3 through 10. Which numbers are prime? Which are not

List the numbers from 3 through 10. Which numbers are prime? Which are not

List the numbers from 3 through 10. Which numbers are prime? Which are not

prime? How do you know?

prime? How do you know?

prime? How do you know?

Are any of the following numbers prime: 6, 8, 10, 12, 14, 16, 18? Explain.

2. 2.

2. 2. 2. 2. 2. 2.

Are any of the following numbers prime: 6, 8, 10, 12, 14, 16, 18? Explain.

Are any of the following numbers prime: 6, 8, 10, 12, 14, 16, 18? Explain.

Are any of the following numbers prime: 6, 8, 10, 12, 14, 16, 18? Explain.

Look at the numbers in problem 2. What do these numbers have in common?

3. 3.

3. 3. 3. 3. 3. 3.

Look at the numbers in problem 2. What do these numbers have in common?

Look at the numbers in problem 2. What do these numbers have in common?

Look at the numbers in problem 2. What do these numbers have in common?

The number 2 is even and it is a prime number. Are there other even numbers

4. 4.

4. 4. 4. 4. 4. 4.

that are prime numbers? Explain.

The number 2 is even and it is a prime number. Are there other even numbers

The number 2 is even and it is a prime number. Are there other even numbers

The number 2 is even and it is a prime number. Are there other even numbers

that are prime numbers? Explain.

that are prime numbers? Explain.

that are prime numbers? Explain.

Explore It

Explore It

A number that is not a prime number is called a composite

5. 5.

5. 5. 5. 5. 5. 5.

number. On a separate sheet of paper, list

the numbers from 2 through 18. Tell

Explore It

Explore It

Explore It

Explore It

Explore It

Explore It

A number that is not a prime number is called a composite

A number that is not a prime number is called a composite

A number that is not a prime number is called a composite

if each number is prime or composite.

Write two pairs of factors for each

number. On a separate sheet of paper, list

number. On a separate sheet of paper, list

number. On a separate sheet of paper, list

the numbers from 2 through 18. Tell

the numbers from 2 through 18. Tell

the numbers from 2 through 18. Tell

composite number on the list.

if each number is prime or composite.

if each number is prime or composite.

if each number is prime or composite.

Write two pairs of factors for each

Write two pairs of factors for each

Write two pairs of factors for each

composite number on the list.

composite number on the list.

composite number on the list.

Name

Name

Date

Date

4–1

4

4–1

4–1

4–1

4 4 4

Name

Name

Name

Name

Name

Name

Date

Date

Date

Date

Date

Date

Prime Numbers

Prime Numbers

Prime Numbers

Prime Numbers

Prime Numbers

Prime Numbers

Prime Numbers

Prime Numbers

A number whose only factors are 1 and itself is called

⫻ ⫻

⫽ ⫽

1

2

2

a

prime number

prime number

. The number 2 is a prime number because

⫻ ⫻ ⫻ ⫻ ⫻ ⫻

⫽ ⫽ ⫽ ⫽ ⫽ ⫽

A number whose only factors are 1 and itself is called

A number whose only factors are 1 and itself is called

A number whose only factors are 1 and itself is called

the only factors of 2 are 1 and 2.

1 1 1

2 2 2

2 2 2

prime number

prime number

prime number

prime number

prime number

prime number

a a a

. The number 2 is a prime number because

. The number 2 is a prime number because

. The number 2 is a prime number because

⫻ ⫻

⫽ ⫽

1

4

4

The number 4 is not a prime number. The number 4 has three

the only factors of 2 are 1 and 2.

the only factors of 2 are 1 and 2.

the only factors of 2 are 1 and 2.

⫻ ⫻ ⫻ ⫻ ⫻ ⫻

⫻ ⫻

⫽ ⫽ ⫽ ⫽ ⫽ ⫽

⫽ ⫽

2

2

4

factors, 1, 2, and 4.

1 1 1

4 4 4

4 4 4

⫻ ⫻ ⫻ ⫻ ⫻ ⫻

⫽ ⫽ ⫽ ⫽ ⫽ ⫽

The number 4 is not a prime number. The number 4 has three

The number 4 is not a prime number. The number 4 has three

The number 4 is not a prime number. The number 4 has three

2 2 2

2 2 2

4 4 4

factors, 1, 2, and 4.

factors, 1, 2, and 4.

factors, 1, 2, and 4.

Think about the definition of prime number

Think about the definition of prime number

s and different wa

s and different wa

ys to make

ys to make

pr pr

oducts to solve the follo

oducts to solve the follo

wing pr

wing pr

oblems.

oblems.

Think about the definition of prime number

Think about the definition of prime number

Think about the definition of prime number

Think about the definition of prime number

Think about the definition of prime number

Think about the definition of prime number

s and different wa

s and different wa

s and different wa

s and different wa

s and different wa

s and different wa

ys to make

ys to make

ys to make

ys to make

ys to make

ys to make

pr pr pr pr pr pr

oducts to solve the follo

oducts to solve the follo

oducts to solve the follo

oducts to solve the follo

oducts to solve the follo

oducts to solve the follo

wing pr

wing pr

wing pr

wing pr

wing pr

wing pr

oblems.

oblems.

oblems.

oblems.

oblems.

oblems.

List the numbers from 3 through 10. Which numbers are prime? Which are not

1. 1.

1. 1. 1. 1. 1. 1.

prime? How do you know?

List the numbers from 3 through 10. Which numbers are prime? Which are not

List the numbers from 3 through 10. Which numbers are prime? Which are not

List the numbers from 3 through 10. Which numbers are prime? Which are not

prime? How do you know?

prime? How do you know?

prime? How do you know?

Are any of the following numbers prime: 6, 8, 10, 12, 14, 16, 18? Explain.

2. 2.

2. 2. 2. 2. 2. 2.

Are any of the following numbers prime: 6, 8, 10, 12, 14, 16, 18? Explain.

Are any of the following numbers prime: 6, 8, 10, 12, 14, 16, 18? Explain.

Are any of the following numbers prime: 6, 8, 10, 12, 14, 16, 18? Explain.

Look at the numbers in problem 2. What do these numbers have in common?

3. 3.

3. 3. 3. 3. 3. 3.

Look at the numbers in problem 2. What do these numbers have in common?

Look at the numbers in problem 2. What do these numbers have in common?

Look at the numbers in problem 2. What do these numbers have in common?

The number 2 is even and it is a prime number. Are there other even numbers

4. 4.

4. 4. 4. 4. 4. 4.

that are prime numbers? Explain.

The number 2 is even and it is a prime number. Are there other even numbers

The number 2 is even and it is a prime number. Are there other even numbers

The number 2 is even and it is a prime number. Are there other even numbers

that are prime numbers? Explain.

that are prime numbers? Explain.

that are prime numbers? Explain.

Explore It

Explore It

A number that is not a prime number is called a composite

5. 5.

5. 5. 5. 5. 5. 5.

number. On a separate sheet of paper, list

the numbers from 2 through 18. Tell

Explore It

Explore It

Explore It

Explore It

Explore It

Explore It

A number that is not a prime number is called a composite

A number that is not a prime number is called a composite

A number that is not a prime number is called a composite

if each number is prime or composite.

Write two pairs of factors for each

number. On a separate sheet of paper, list

number. On a separate sheet of paper, list

number. On a separate sheet of paper, list

the numbers from 2 through 18. Tell

the numbers from 2 through 18. Tell

the numbers from 2 through 18. Tell

composite number on the list.

if each number is prime or composite.

if each number is prime or composite.

if each number is prime or composite.

Write two pairs of factors for each

Write two pairs of factors for each

Write two pairs of factors for each

composite number on the list.

composite number on the list.

composite number on the list.

Name

Name

Date

Date

4–1

4

4–1

4–1

4–1

4 4 4

Name

Name

Name

Name

Name

Name

Date

Date

Date

Date

Date

Date

Prime Numbers

Prime Numbers

Prime Numbers

Prime Numbers

Prime Numbers

Prime Numbers

Prime Numbers

Prime Numbers

A number whose only factors are 1 and itself is called

⫻ ⫻

⫽ ⫽

1

2

2

a

prime number

prime number

. The number 2 is a prime number because

⫻ ⫻ ⫻ ⫻ ⫻ ⫻

⫽ ⫽ ⫽ ⫽ ⫽ ⫽

A number whose only factors are 1 and itself is called

A number whose only factors are 1 and itself is called

A number whose only factors are 1 and itself is called

the only factors of 2 are 1 and 2.

1 1 1

2 2 2

2 2 2

prime number

prime number

prime number

prime number

prime number

prime number

a a a

. The number 2 is a prime number because

. The number 2 is a prime number because

. The number 2 is a prime number because

⫻ ⫻

⫽ ⫽

1

4

4

The number 4 is not a prime number. The number 4 has three

the only factors of 2 are 1 and 2.

the only factors of 2 are 1 and 2.

the only factors of 2 are 1 and 2.

⫻ ⫻ ⫻ ⫻ ⫻ ⫻

⫻ ⫻

⫽ ⫽ ⫽ ⫽ ⫽ ⫽

⫽ ⫽

2

2

4

factors, 1, 2, and 4.

1 1 1

4 4 4

4 4 4

⫻ ⫻ ⫻ ⫻ ⫻ ⫻

⫽ ⫽ ⫽ ⫽ ⫽ ⫽

The number 4 is not a prime number. The number 4 has three

The number 4 is not a prime number. The number 4 has three

The number 4 is not a prime number. The number 4 has three

2 2 2

2 2 2

4 4 4

factors, 1, 2, and 4.

factors, 1, 2, and 4.

factors, 1, 2, and 4.

Think about the definition of prime number

Think about the definition of prime number

s and different wa

s and different wa

ys to make

ys to make

pr pr

oducts to solve the follo

oducts to solve the follo

wing pr

wing pr

oblems.

oblems.

Think about the definition of prime number

Think about the definition of prime number

Think about the definition of prime number

Think about the definition of prime number

Think about the definition of prime number

Think about the definition of prime number

s and different wa

s and different wa

s and different wa

s and different wa

s and different wa

s and different wa

ys to make

ys to make

ys to make

ys to make

ys to make

ys to make

pr pr pr pr pr pr

oducts to solve the follo

oducts to solve the follo

oducts to solve the follo

oducts to solve the follo

oducts to solve the follo

oducts to solve the follo

wing pr

wing pr

wing pr

wing pr

wing pr

wing pr

oblems.

oblems.

oblems.

oblems.

oblems.

oblems.

List the numbers from 3 through 10. Which numbers are prime? Which are not

1. 1.

1. 1. 1. 1. 1. 1.

prime? How do you know?

List the numbers from 3 through 10. Which numbers are prime? Which are not

List the numbers from 3 through 10. Which numbers are prime? Which are not

List the numbers from 3 through 10. Which numbers are prime? Which are not

3, 5, and 7 are prime; 4, 6, 8, 9, and 10 are not prime. 3, 5,

3, 5, and 7 are prime; 4, 6, 8, 9, and 10 are not prime. 3, 5,

prime? How do you know?

prime? How do you know?

prime? How do you know?

and 7 only have the factors 1 and 3, 5, or 7.

and 7 only have the factors 1 and 3, 5, or 7.

3, 5, and 7 are prime; 4, 6, 8, 9, and 10 are not prime. 3, 5,

3, 5, and 7 are prime; 4, 6, 8, 9, and 10 are not prime. 3, 5,

3, 5, and 7 are prime; 4, 6, 8, 9, and 10 are not prime. 3, 5,

3, 5, and 7 are prime; 4, 6, 8, 9, and 10 are not prime. 3, 5,

3, 5, and 7 are prime; 4, 6, 8, 9, and 10 are not prime. 3, 5,

3, 5, and 7 are prime; 4, 6, 8, 9, and 10 are not prime. 3, 5,

Are any of the following numbers prime: 6, 8, 10, 12, 14, 16, 18? Explain.

and 7 only have the factors 1 and 3, 5, or 7.

and 7 only have the factors 1 and 3, 5, or 7.

and 7 only have the factors 1 and 3, 5, or 7.

and 7 only have the factors 1 and 3, 5, or 7.

2. 2.

and 7 only have the factors 1 and 3, 5, or 7.

and 7 only have the factors 1 and 3, 5, or 7.

2. 2. 2. 2. 2. 2.

Are any of the following numbers prime: 6, 8, 10, 12, 14, 16, 18? Explain.

Are any of the following numbers prime: 6, 8, 10, 12, 14, 16, 18? Explain.

Are any of the following numbers prime: 6, 8, 10, 12, 14, 16, 18? Explain.

No, because the number 2 is also a factor of each of

No, because the number 2 is also a factor of each of

these numbers.

these numbers.

No, because the number 2 is also a factor of each of

No, because the number 2 is also a factor of each of

No, because the number 2 is also a factor of each of

No, because the number 2 is also a factor of each of

No, because the number 2 is also a factor of each of

No, because the number 2 is also a factor of each of

Look at the numbers in problem 2. What do these numbers have in common?

3. 3.

these numbers.

these numbers.

these numbers.

these numbers.

these numbers.

these numbers.

3. 3. 3. 3. 3. 3.

They are all even numbers.

They are all even numbers.

Look at the numbers in problem 2. What do these numbers have in common?

Look at the numbers in problem 2. What do these numbers have in common?

Look at the numbers in problem 2. What do these numbers have in common?

They are all even numbers.

They are all even numbers.

They are all even numbers.

They are all even numbers.

The number 2 is even and it is a prime number. Are there other even numbers

They are all even numbers.

They are all even numbers.

4. 4.

4. 4. 4. 4. 4. 4.

that are prime numbers? Explain.

The number 2 is even and it is a prime number. Are there other even numbers

The number 2 is even and it is a prime number. Are there other even numbers

The number 2 is even and it is a prime number. Are there other even numbers

No, all other even numbers have the number 2 as a factor.

No, all other even numbers have the number 2 as a factor.

that are prime numbers? Explain.

that are prime numbers? Explain.

that are prime numbers? Explain.

Explore It

Explore It

A number that is not a prime number is called a composite

5. 5.

No, all other even numbers have the number 2 as a factor.

No, all other even numbers have the number 2 as a factor.

No, all other even numbers have the number 2 as a factor.

No, all other even numbers have the number 2 as a factor.

No, all other even numbers have the number 2 as a factor.

No, all other even numbers have the number 2 as a factor.

5. 5. 5. 5. 5. 5.

number. On a separate sheet of paper, list

the numbers from 2 through 18. Tell

Explore It

Explore It

Explore It

Explore It

Explore It

Explore It

A number that is not a prime number is called a composite

A number that is not a prime number is called a composite

A number that is not a prime number is called a composite

if each number is prime or composite.

Write two pairs of factors for each

number. On a separate sheet of paper, list

number. On a separate sheet of paper, list

number. On a separate sheet of paper, list

the numbers from 2 through 18. Tell

the numbers from 2 through 18. Tell

the numbers from 2 through 18. Tell

composite number on the list.

if each number is prime or composite.

if each number is prime or composite.

if each number is prime or composite.

Write two pairs of factors for each

Write two pairs of factors for each

Write two pairs of factors for each

Check students’ work.

Check students’ work.

composite number on the list.

composite number on the list.

composite number on the list.

Prime numbers: 2, 3, 5, 7, 11, 13, 17

Prime numbers: 2, 3, 5, 7, 11, 13, 17

Check students’ work.

Check students’ work.

Check students’ work.

Check students’ work.

Check students’ work.

Check students’ work.

Composite numbers: 4, 6, 8, 9, 10, 12, 14, 15, 16

Composite numbers: 4, 6, 8, 9, 10, 12, 14, 15, 16

Prime numbers: 2, 3, 5, 7, 11, 13, 17

Prime numbers: 2, 3, 5, 7, 11, 13, 17

Prime numbers: 2, 3, 5, 7, 11, 13, 17

Prime numbers: 2, 3, 5, 7, 11, 13, 17

Prime numbers: 2, 3, 5, 7, 11, 13, 17

Prime numbers: 2, 3, 5, 7, 11, 13, 17

Composite numbers: 4, 6, 8, 9, 10, 12, 14, 15, 16

Composite numbers: 4, 6, 8, 9, 10, 12, 14, 15, 16

Composite numbers: 4, 6, 8, 9, 10, 12, 14, 15, 16

Composite numbers: 4, 6, 8, 9, 10, 12, 14, 15, 16

Composite numbers: 4, 6, 8, 9, 10, 12, 14, 15, 16

Composite numbers: 4, 6, 8, 9, 10, 12, 14, 15, 16

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