Exploring Factor Pairs and Number Types

The video tutorial introduces fourth-graders to the concept of factors, factor pairs, and how to determine if a number is prime or composite. Using the number 12, the video demonstrates how to find all factor pairs through visual examples and introduces the concept of a factor rainbow. It explains composite numbers and uses the number 11 to illustrate prime numbers. The tutorial also shows how multiplication tables can help identify prime and composite numbers, summarizing the key concepts of factors, factor pairs, prime numbers, and composite numbers.

What is the first step in finding the factors of a number?

• List the number and 1 as factors

• Divide the number by 2

• Multiply the number by itself

• Subtract 1 from the number

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CCSS.4.OA.B.4

How many rows are there in the first array built using 12 circles?

• 1 row

• 2 rows

• 3 rows

• 4 rows

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CCSS.2.OA.C.4

Which of the following is a factor pair of 12?

• 1 and 11

• 4 and 5

• 2 and 6

• 3 and 5

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CCSS.4.OA.B.4

What is a factor rainbow?

• A method to divide numbers

• A technique to multiply numbers

• A way to list factors in order from least to greatest

• A method to find prime numbers

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CCSS.4.OA.B.4

Why is 12 considered a composite number?

• It is a prime number

• It is an even number

• It has more factors than just 1 and itself

• It has only one factor

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CCSS.4.OA.B.4

What are the only factor pairs of 11?

• 1 and 11

• 2 and 5

• 3 and 4

• 6 and 7

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CCSS.4.OA.B.4

Which number is used as an example of a prime number?

• 12

• 10

• 9

• 11

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CCSS.4.OA.B.4

What does a multiplication table help you identify?

• Neither prime nor composite numbers

• Only composite numbers

• Only prime numbers

• Both prime and composite numbers

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CCSS.4.OA.B.4

What is a composite number?

• A number with factors other than 1 and itself

• A number with only one factor

• A number that is always even

• A number that cannot be divided

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CCSS.4.OA.B.4

What is a prime number?

• A number with only two factors: 1 and itself

• A number with only one factor

• A number with factors other than 1 and itself

• A number that is always odd

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CCSS.4.OA.B.4