Module 1 Decimals and Fractions 1.05 Dividing Fractions Live Lesson

1.05 Lesson Objectives After completing this lesson, you will be able to say: I can use models to represent quotients of fractions. I can compute the quotient of two fractions. I can interpret the meaning of the quotient. I can solve problems using division of fractions.

Division with Models Models can usually make a mathematical problem easier to tackle Different types of Models  Double Bar Model  Line Model  Rectangular Cross Box Model It is up to you which of the fraction models you would like to use.

Double Bar Model

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Line Model

Try It Find the quotient of

Rectangular Cross Box Model

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Dividing Fractions Drawing models is one way to divide fractions. It can become difficult to draw all those models A standard method you can use to divide fractions requires you to use the reciprocal of the divisor What is a reciprocal?

Reciprocal

Dividing Fractions using the Reciprocal 1. Rewrite the problem (KSF) Keep the first fraction Switch the sign to multiplication Flip the second fraction 2. Use Cancellation if possible. 3. Multiply numerator times numerator 4. Multiply denominator times denominator 5. Check to see if the final answer is in simplest form

1. Rewrite the problem (KSF) Keep the first fraction Switch the sign to multiplication Flip the second fraction 2. Use Cancellation if possible. 3. Multiply numerator times numerator 4. Multiply denominator times denominator 5. Check to see if the final answer is in simplest form

Example

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Sum it Up!

Sum It Up!

After completing this lesson, you will be able to say: I can use models to represent quotients of fractions. I can compute the quotient of two fractions. I can interpret the meaning of the quotient. I can solve problems using division of fractions.