Prime Factorization and Factor Trees

The video tutorial from Minity Maths explains how to find the prime factors of a number using the factor tree method. It begins with a definition of prime factors and demonstrates the factor tree method with examples, including how to express prime factors in index form. The video encourages viewers to practice the method with provided questions.

What is a prime factor?

• A number that can be divided by any other number.

• A number that is only divisible by 1 and itself.

• A number that is even.

• A number that is a multiple of 10.

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CCSS.4.OA.B.4

Which method is used to find all the prime factors of a number?

• Addition method

• Subtraction method

• Factor tree method

• Division method

In the factor tree method, what do you do when you reach a prime number?

• Circle it

• Add it to the tree

• Multiply it by 2

• Erase it

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CCSS.4.OA.B.4

What is the first step in creating a factor tree for the number 48?

• Write 48 at the top and split it into two factors.

• Divide 48 by 10.

• Multiply 48 by 2.

• Subtract 10 from 48.

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CCSS.4.OA.B.4

How do you list prime factors in index form?

• By writing them in ascending order and using powers.

• By writing them in descending order.

• By writing them in alphabetical order.

• By writing them in random order.

What is the prime factorization of 72 in index form?

• 2^3 x 3^2

• 2^2 x 3^3

• 2^4 x 3

• 2 x 3^3

What should you do after completing the factor tree?

• Divide the largest number by the smallest.

• Multiply all numbers together.

• List the prime factors in order.

• Erase the tree.