Understanding Fraction Multiplication with Cancellation

In this video, Mr. Jay explains how to use cancellation, also known as cross-cancellation, to simplify the multiplication of fractions. He demonstrates this technique with two examples, showing both the use of cancellation and the process without it. The video highlights the benefits of cancellation in making calculations easier and emphasizes that while not necessary, it is a helpful strategy. The tutorial concludes with a summary of the key points covered.

What is the main purpose of using cancellation when multiplying fractions?

• To simplify the problem before multiplying

• To make the numbers larger

• To change the fractions to decimals

• To add the fractions together

In the first example, what common factor is used to simplify the fractions 10 and 5?

• 2

• 3

• 10

• 5

Tags

CCSS.5.NF.B.6

What is the result of multiplying 7/10 by 5/6 using cancellation?

• 5/8

• 35/60

• 7/12

• 1/2

Tags

CCSS.5.NF.B.6

When multiplying 7/10 by 5/6 without cancellation, what is the initial result before simplification?

• 1/2

• 7/12

• 35/60

• 5/8

What is the greatest common factor used to simplify 35/60?

• 2

• 3

• 5

• 7

In the second example, what common factor is used to simplify the fractions 15 and 12?

• 6

• 5

• 3

• 2

Tags

CCSS.5.NF.B.6

What is the result of multiplying 15/22 by 11/12 using cancellation?

• 15/22

• 5/8

• 7/12

• 11/24

What is the greatest common factor used to simplify 22 and 11 in the second example?

• 5

• 3

• 2

• 11

Tags

CCSS.5.NF.B.6

Why is cancellation considered a helpful strategy when multiplying fractions?

• It adds the fractions together

• It changes fractions to decimals

• It simplifies the problem and makes calculations easier

• It makes the numbers larger

Tags

CCSS.5.NF.B.6

What is the final simplified result of multiplying 15/22 by 11/12 without using cancellation?

• 15/22

• 5/8

• 11/24

• 7/12

Tags

CCSS.5.NF.B.6