Multiplying & Scaling Fractions

Multiplying Fractions

100

1/2 x 1/4 

1/8

200

3/4 x 5/6

15/24 = 5/8

300

7 x 4/5

28/5 = 5 3/5

400

8 x 2/3

16/3 = 5 1/3

500

6/11 x 7/9

42/99

Multiplying Fractions Word Problems

100

Farmer Brown is planting a garden with 2/3 vegetables. 2/3 of the vegetable section will have carrots.  What area of the garden will be carrots?

4/6 = 1/3

200

Cody is shooting free throws to practice for his basketball game.  He shoots 24 baskets and makes 5/8 of his shots. How many shots did he make in the basket?

15 shots

300

Mrs. Oats is getting ready for her students to start an art project.  She needs each of her students to use 3/4 pound of clay and there are 15 students in the class.  How much clay should she have ready?

45/4 = 11 1/4 pounds

400

John cuts the grass for the neighborhood school.  The field he cuts has a length of 3/4 a mile and a width of 3/5 of a mile.  What is the area of the field he is cutting?

9/20 square mile

500

Rob had 3/4 pan of lasagna left over from a dinner party.  He took 1/6 of it to lunch the next day.  How much of the pan did Rob take to lunch?

3/24 or 1/8

Multiplication as Scaling

100

True or False

2/3 x 5 > 2/3

True

200

True or False:

1/2 x 1/4 > 1/2

False

300

True or False

3/4 x 5/3 < 3/4

False

400

Do you always get a larger number when multiplying?

No - you only get larger numbers when multiplying a factor by a number LARGER THAN one.

500

1/2 x 2/3 = 2/6

Explain why the product is less than the factors.

When multiplying by a number that is LESS THAN one, you get a product that is smaller than the factors.