Dividing Mixed Numbers by Fractions Using Models

This video tutorial teaches how to divide mixed numbers by fractions using models. It begins with an introduction to dividing whole numbers by fractions, explaining the concept with models. The tutorial then progresses to dividing mixed numbers by fractions, using a practical example of dividing hamburger meat into portions. Finally, it applies the concept to a real-world problem involving plant growth, demonstrating how to calculate the number of weeks needed for a plant to grow a certain height. The lesson emphasizes understanding through visual models and practical applications.

What is the result of dividing 2 by 1/4?

• 10

• 8

• 6

• 4

How many hamburgers can be made from 2 1/2 pounds of meat if each hamburger weighs 1/4 pound?

• 12

• 10

• 5

• 8

What is the first step in using a model to divide mixed numbers by fractions?

• Use rectangles to represent whole units

• Shade the entire model

• Divide the whole into halves

• Use circles to represent units

How many groups of 1/4 are in two whole units?

• 10

• 6

• 4

• 8

In the plant growth example, how many weeks will it take for the plant to grow 1 3/4 inches?

• 3 1/2 weeks

• 3 weeks

• 4 weeks

• 2 weeks

What is the division equation used to find out how many weeks it takes for the plant to grow 1 3/4 inches?

• 1 3/4 divided by 1/4

• 1 3/4 divided by 1/2

• 1 3/4 divided by 2

• 1 3/4 divided by 1

What is the result of dividing 1 3/4 by 1/2?

• 2

• 3

• 3 1/2

• 4