Ratio Tables and Cross Products

What is a proportion?

• Two equal ratios

• Percent

• Part

• Whole

Tags

CCSS.7.RP.A.2A

What is the ratio of red circles to blue circles?

• 5:5

• 6:5

• 5:6

• 1:2

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

What is the ratio between apples and oranges?

• 6:9

• 3:6

• 3:4

• 2:3

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

There are 14 tables and 16 desks in the classroom. What is the ratio of tables to desks?

• 8 : 7

• 7 : 8

• 4 : 6

• 6 : 4

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

The ratio of shorts to jeans in Caroline's dresser is 3 to 4. If she has 21 shorts, what is the proportion that will solve for the amount of jeans she has?

Do the following form a proportional relationship?

• Yes because their cross products equal 504.

• No because they have different cross products of 276 and 504

Tags

CCSS.7.RP.A.2A

Do the following form a proportional relationship:

• Yes because the cross products both equal 714.

• No because the cross products are not equal. They are 714 and 387.

Tags

CCSS.7.RP.A.2A

Solve for x 

• x = 16

• x = 28

• x = 1/26

• x = 26

Tags

CCSS.7.RP.A.2C

Solve the proportion.

• q=2

• q=9

• q=4.5

• q=6

Tags

CCSS.7.RP.A.2B

The ratio of cups of sugar to cups of flour needed to bake cookies is 1:5. If Myesha uses 25 cups of flour, how much sugar is needed?

• 125 cups

• 5 cups

• 15 cups

• 10 cups