Exploring Prime and Composite Numbers

In this video, Mr. Leatherwood and Mrs. Weeks introduce the concepts of prime and composite numbers using arrays. They demonstrate how to model the number 17 as a prime number with only two factors, 1 and 17. The video then explores the number 12, showing it as a composite number with multiple factors, including 2, 3, 4, and 6. The instructors encourage viewers to create their own arrays using objects or drawings to better understand the difference between prime and composite numbers. The video concludes with a suggestion for viewers to practice building arrays to reinforce the concepts learned.

What is the main topic discussed in the video?

• Fractions and Decimals

• Addition and Subtraction

• Prime and Composite Numbers

• Multiplication and Division

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

What is an array in the context of this video?

• A picture representation of a number

• A type of graph

• A mathematical operation

• A list of numbers

Tags

CCSS.3.OA.A.1

How many factors does the number 17 have?

• Four

• One

• Two

• Three

Tags

CCSS.4.OA.B.4

Which of the following is a correct array for the number 17?

• 1 x 17

• 4 x 4.25

• 3 x 5.67

• 2 x 8.5

Tags

CCSS.4.NBT.B.6

What is the product of 2 and 6?

• 8

• 10

• 12

• 14

Tags

CCSS.3.OA.C.7

Which of the following is NOT a factor of 12?

• 6

• 3

• 2

• 5

Tags

CCSS.4.OA.B.4

What property allows us to reverse the factors in multiplication?

• Identity Property

• Associative Property

• Distributive Property

• Commutative Property

Tags

CCSS.4.NBT.B.5

How many factors does the number 12 have?

• Six

• Four

• Eight

• Two

Tags

CCSS.4.OA.B.4

What defines a composite number?

• A number with no factors

• A number with more than two factors

• A number with exactly two factors

• A number with only one factor

Tags

CCSS.4.OA.B.4

What activity is suggested to help understand prime and composite numbers?

• Reading a book

• Solving equations

• Building arrays with household items

• Watching another video

Tags

CCSS.4.OA.B.4