Creating Factor Trees for Prime Factorization

What is the purpose of using a factor tree?

• To divide a number by 2

• To multiply two numbers

• To find the sum of a number

• To find the prime factorization of a number

Tags

CCSS.4.OA.B.4

Which two factors does Maria choose to start the factor tree for the number 50?

• 15 and 3

• 25 and 2

• 10 and 5

• 20 and 5

Tags

CCSS.4.OA.B.4

What should you do when you identify a prime number in the factor tree?

• Circle it

• Ignore it

• Underline it

• Cross it out

Why is the number 5 considered a prime number?

• It is greater than 4

• It has only two factors: 1 and itself

• It is an even number

• It can be divided by 3

Tags

CCSS.4.OA.B.4

What are the prime factors of 10?

• 5 and 7

• 2 and 3

• 3 and 5

• 2 and 5

Tags

CCSS.4.OA.B.4

What is the next step after circling all the prime numbers in the factor tree?

• Add the numbers together

• Write the numbers in order from least to greatest

• Multiply the numbers by 2

• Divide the numbers by 5

How do you write the prime factorization of 50 in standard form?

• 2 + 5 + 5

• 2 x 5 x 5

• 2 + 5 x 5

• 2 x 5 + 5

Tags

CCSS.6.EE.A.1

What is the final step in the factor tree method?

• Multiply the prime factors by 5

• Write the prime factors in exponential form

• Divide the prime factors by 2

• Add all the prime factors

How do you write 5 times 5 in exponential form?

• 5^2

• 5^3

• 5^1

• 5^0

Tags

CCSS.6.EE.A.1

What is the prime factorization of 50 in exponential form?

• 2^2 x 5^2

• 2 x 5^3

• 2 x 5^2

• 2^2 x 5