Optional Practice for 2.1-2.3 flashcard (7th)

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities when they are combined together. It expresses how much of one quantity corresponds to one unit of another quantity.

Front

How do you calculate the unit rate from a given situation?

Back

To calculate the unit rate, divide the total amount of one quantity by the total amount of the other quantity. For example, if pasta costs $2.60 for 20 ounces, the unit rate is calculated as $2.60 ÷ 20 ounces = $0.13 per ounce.

Front

If Maya makes $10 an hour, how many hours will it take her to earn $150?

Back

15 hours. (Calculation: $150 ÷ $10/hour = 15 hours.)

Front

If Antonia can type 408 words in 4 minutes, how many words can she type per minute?

Back

102 words per minute. (Calculation: 408 words ÷ 4 minutes = 102 words/minute.)

Front

What is a ratio?

Back

A ratio is a relationship between two numbers indicating how many times the first number contains the second.

Front

How do you find the unit rate from a ratio?

Back

To find the unit rate from a ratio, divide the first number by the second number. For example, if the ratio is 18:1, the unit rate is 18.

Front

If Alice drives 250 miles in 5 hours, what is her speed in miles per hour?

Back

50 miles per hour. (Calculation: 250 miles ÷ 5 hours = 50 miles/hour.)

Front

What is the formula for calculating unit rate?

Back

Unit Rate = Total Amount of First Quantity ÷ Total Amount of Second Quantity.

Front

If a car travels 300 miles in 6 hours, what is the unit rate of speed?

Back

50 miles per hour. (Calculation: 300 miles ÷ 6 hours = 50 miles/hour.)

Front

What does it mean to solve for a variable in an equation?

Back

Solving for a variable means finding the value of that variable that makes the equation true.