multiplying & dividing fractions

15
Agenda Wednesday, Dec. 1 5.4 Multiplying & Dividing Fractions Homework Check Homework 9 p. 255 # 2 - 20 evens,13, 24, 26, 38, 55 Quiz Friday Ch. 5-1 - 5-4

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Page 1: Multiplying & dividing fractions

Agenda Wednesday, Dec. 1

5.4 Multiplying & Dividing Fractions

Homework Check

Homework 9 p. 255 # 2 - 20 evens,13, 24, 26, 38, 55

Quiz Friday Ch. 5-1 - 5-4

Page 2: Multiplying & dividing fractions
Page 3: Multiplying & dividing fractions

How to Multiply Fractions:

Multiply the numerators:

1 2

5 4

3 6

2

5

2

4

3 6

20

Multiply the denominators:

3

Simplifythe fractionif necessary:

6

20

3

10

Page 4: Multiplying & dividing fractions
Page 5: Multiplying & dividing fractions
Page 6: Multiplying & dividing fractions
Page 7: Multiplying & dividing fractions
Page 8: Multiplying & dividing fractions

How to Divide Fractions:

Multiply the firstfraction by thereciprocal of the second fraction.

1

4

5

2

3

3

2

4

5

2 Multiply the numeratorsand denominators:

3

2

4

5

12

10

3Simplify the fractionif necessary:

12

10

1

5

1

Page 9: Multiplying & dividing fractions
Page 10: Multiplying & dividing fractions
Page 11: Multiplying & dividing fractions
Page 12: Multiplying & dividing fractions
Page 13: Multiplying & dividing fractions
Page 14: Multiplying & dividing fractions

I am baking cookies for our Christmas holiday. I need to triple the batch. How many of each ingredient do I need?

Huszarcsok

1 1/2 c. butter1/4 tsp. salt1 c. sugar3 egg yolks2 1/4 tsp vanilla1/8 tsp almond extract3 1/2 c. flour1/2 c. jam2/3 c. slivered almonds

Page 15: Multiplying & dividing fractions

Swedish Pepparkakor

3 1/2 c. flour1 tsp. baking soda1 1/2 tsp. ginger1 1/2 tsp. cinnamon1 tsp. cloves1/4 tsp. cardamon1/2 c. butter3/4 c. sugar1 egg ( I'll have to use Egg Beaters.)3/4 c. molasses2 tsp. orange peel

I only want half of this recipe. Give the new amounts for each ingredient.