Understanding Factors and Prime Factorization

The video tutorial explains how to find the factors and prime factorization of the numbers 81 and 82. It begins with an introduction to factorization, followed by a detailed breakdown of the factors of 81, including its prime factorization using a factor tree. The tutorial then moves on to the factors of 82, again demonstrating the process of finding its prime factors. The video concludes with a call to action, encouraging viewers to subscribe for more math and science content.

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

• Divide the number by 2

• List all numbers that multiply to give the number

• Subtract 1 from the number

• Multiply the number by itself

Tags

CCSS.4.OA.B.4

Which of the following is a factor pair of 81?

• 5 and 16

• 2 and 41

• 3 and 27

• 1 and 82

What is the prime factorization of 81?

• 9 x 9

• 3 x 3 x 3

• 3 x 3 x 3 x 3

• 2 x 2 x 2 x 2

Tags

CCSS.4.OA.B.4

Which number is not a factor of 81?

• 1

• 9

• 27

• 82

Tags

CCSS.4.OA.B.4

What are the factors of 82?

• 1, 2, 41, 82

• 1, 3, 27, 81

• 2, 4, 20, 40

• 1, 5, 16, 80

Tags

CCSS.4.OA.B.4

Which of the following is a prime factor of 82?

• 3

• 9

• 2

• 27

What is the result of dividing 82 by its smallest prime factor?

• 9

• 41

• 27

• 3