Proportions

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Tags

CCSS.7.RP.A.2A

Front

How do you set up a proportion?

Back

To set up a proportion, you can use the formula a/b = c/d, where a, b, c, and d are numbers.

Tags

CCSS.7.RP.A.2C

Front

If 3 pounds of meat cost $6, how much does 1 pound cost?

Back

$2 per pound.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

If 14 sticks of pepperoni are needed for 28 pizzas, how many sticks are needed for 1 pizza?

Back

0.5 sticks per pizza.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is the cross-multiplication method in proportions?

Back

Cross-multiplication involves multiplying the numerator of one ratio by the denominator of the other ratio.

Front

If there are 5 ice cream cones for every 3 brownies, what is the ratio of cones to brownies?

Back

The ratio is 5:3.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

How do you find an unknown in a proportion?

Back

You can find an unknown by cross-multiplying and then solving for the variable.

Tags

CCSS.7.RP.A.2C

Front

If 24 brownies are sold, how many ice cream cones are sold if the ratio is 5:3?

Back

40 ice cream cones.

Tags

CCSS.6.RP.A.3B

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities when they are combined together, expressed as a quantity per 1 unit.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

How do you calculate the total cost when given a unit price?

Back

Multiply the unit price by the number of units purchased.

Tags

CCSS.6.RP.A.3B