Study Guide: Unit rate and better buys

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities where one of the quantities is expressed as one unit. For example, if you buy 4 apples for $2, the unit rate is $0.50 per apple.

Front

How do you calculate the unit rate?

Back

To calculate the unit rate, divide the total quantity by the total cost. For example, if 10 ounces cost $5, the unit rate is $5 ÷ 10 ounces = $0.50 per ounce.

Front

What does 'better buy' mean?

Back

A 'better buy' refers to the option that offers the best value for the price, often determined by comparing unit rates.

Front

If an item costs $3 for 6 items, what is the unit price?

Back

The unit price is $3 ÷ 6 = $0.50 per item.

Front

Which is a better buy: $4 for 2 pounds of apples or $6 for 3 pounds of apples?

Back

$4 for 2 pounds is $2 per pound, while $6 for 3 pounds is $2 per pound. They are equal.

Front

What is the unit rate for $15 for 5 gallons?

Back

The unit rate is $15 ÷ 5 gallons = $3 per gallon.

Front

How do you determine which product is a better buy?

Back

To determine the better buy, calculate the unit price for each product and compare them. The lower unit price is the better buy.

Front

If a 12-ounce drink costs $1.50, what is the cost per ounce?

Back

The cost per ounce is $1.50 ÷ 12 ounces = $0.125 per ounce.

Front

What is the unit rate for $10 for 4 items?

Back

The unit rate is $10 ÷ 4 items = $2.50 per item.

Front

If one brand of soap costs $2.50 for 5 ounces and another costs $3 for 8 ounces, which is cheaper per ounce?

Back

The first brand costs $0.50 per ounce, while the second costs $0.375 per ounce. The second brand is cheaper.