AgendaTuesday, Dec. 15

homework 20 p. 255 # 1 - 5, 8 - 13, 31 -33

reminder - quiz Friday

correct homework

Daily Scribe

Multiplying fractions

p. 250 # 4 - 7, 9 - 11, 13 - 19 odds

How to Multiply Fractions:

Multiply the numerators:

1 2

5 4

3 6

25

2

4

3 6

20

Multiply the denominators:

3Simplifythe fractionif necessary:

6

20

3

10

How to Multiply Positive & Negative Fractions:

A negative times a negative is a positive.

1 2

5 4

3 6

20 10

3

25

2

4

3 6

20

A negativetimes a positiveis a negative.

10

3

3A positivetimes a negativeis a negative. 5

2

4

3 6

20 10

3

How to Multiply Fractions &Mixed Numbers:

Make mixed numbers into improper fractions.

25

12

4

3

12

5 4

32

4 Multiply& Simplify 5

3

1

3 9

51 4/5

3 Simplify if possible

5

12

4

3

We can model multiplying fractions with an area model.

If this were a pan of brownies, how much of the pan is left?

What if I wanted to give 2/3 of the 3/4 away?

How much will I give away?

Sophia is baking brownies for the school fair. She baked the brownies in square pans and is selling them in fractional parts.

One pan was 2/3 full. Mr. Lyons bought 1/2 of what was left. What fraction of the pan did Mr. Lyons buy?

Sophia's Great-Grampa wanted to buy 3/4 of another pan. That pan was half full. How much of a whole pan did he buy?

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

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 egg3/4 c. molasses2 tsp. orange peel

I want to double this recipe. Give the new amounts for each ingredient.

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