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Welcome to Math 6 Today’s topic is… Division (part 2)

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1 Welcome to Math 6 Today’s topic is… Division (part 2)

2 The Connector… In our last lesson, we discussed how to divide whole numbers and decimals. In this lesson I will explain how to divide fractions by whole numbers or whole numbers by fractions.

3 When to use a fractional approach? Mr. Shin has a piece of lumber that is 11 5/8 inches wide. He plans to split the width of lumber into 3 equal pieces. How wide will each piece be?

4 OBJECTIVE: Each student will:  Divide fractions by whole numbers  Divide whole numbers by fractions.  Divide fractions by fractions

5 Inverse means ‘opposite.’ Inverse can describe mathematic operations, as in: “Division is the Inverse of Multiplication.” “Subtraction is the Inverse of addition.”

6 Division of fractions follows the same steps as multiplication of fractions, but there is one additional step. To divide fractions, you need to invert the divisor and then multiply.

7 To invert a fraction, reverse the numerator and denominator. The special name given to an inverted fraction is reciprocal. Recall that a whole number has a understood denominator of 1.

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9 Julia ate 1/2 pint of chocolate chip ice cream. Mark ate 3/4 pint of vanilla ice cream. How many times more ice cream did Mark eat?

10 ICE CREAM. Julia ate 1/2 pint of mint chocolate chip ice cream. Mark ate 3/4 pint of vanilla ice cream. How many times more ice cream did Mark eat?

11 Lane wants to cut a board into three equal pieces. The board is 5/8 feet long. How long will each piece be?

12 Laura wants to cut a board into three equal pieces. The board is 5/8 feet long. How long will each piece be?

13 Norberto has 7/8 of a pizza. The pizza will be divided equally among 6 people. How much will each person get?

14 PIZZA. Norberto has 7/8 of a pizza. The pizza will be divided equally among 6 people. How much will each person get?

15 Dividing mixed numbers First convert to an improper fraction. Then divide. Example: Julia has 3 1/2 pounds of dog food. She plans to split it equally among her 7 dogs. How much dog food will each dog receive?

16 1.Solve all equations from “Dividing Fractions A” worksheet. 2.Complete the Division with Fractions Problem Page.

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