Simplifying Fractions: Example Problems Explained

In this video tutorial, the teacher introduces the concept of the greatest common factor (GCF), explaining it as the largest factor shared by two numbers. The video demonstrates how to find the GCF using examples with the numbers 4 and 20, and 12 and 20. The teacher explains the process of listing factors and identifying the common ones, emphasizing that the GCF can sometimes be one of the numbers if it divides the other. The tutorial concludes with encouragement for students to practice finding the GCF with different pairs of numbers.

What does GCF stand for?

• Greatest Common Formula

• Greatest Common Fraction

• Greatest Common Factor

• Greatest Common Function

Which of the following is a factor of 4?

• 3

• 5

• 2

• 7

Tags

CCSS.4.OA.B.4

What is the greatest common factor of 4 and 20?

• 1

• 2

• 4

• 5

Which of the following is NOT a factor of 20?

• 5

• 10

• 3

• 1

Tags

CCSS.4.OA.B.4

Why is 4 the greatest common factor of 4 and 20?

• Because 4 is a factor of both numbers

• Because 4 is an even number

• Because 4 is the smallest number

• Because 4 is a prime number

Which of the following pairs of numbers have 4 as their GCF?

• 4 and 20

• 6 and 9

• 10 and 15

• 8 and 12

What are the factors of 12?

• 1, 2, 5, 10, 12

• 1, 2, 3, 4, 6, 12

• 1, 3, 6, 9, 12

• 1, 2, 4, 8, 12

Tags

CCSS.4.OA.B.4

Which of the following is a common factor of 12 and 20?

• 4

• 5

• 3

• 7

Tags

CCSS.4.OA.B.4

What is the greatest common factor of 12 and 20?

• 6

• 1

• 4

• 2

What should you do next after learning about GCF?

• Forget about it

• Practice with different pairs of numbers

• Only use it in exams

• Ignore it