WEEK 16: Unit Rates-7th grade-Cornell

Front

What is a unit rate?

Back

A unit rate is a ratio that compares a quantity to one unit of another quantity, often expressed as 'per' something, like miles per hour or dollars per item.

Front

How do you calculate a unit rate?

Back

To calculate a unit rate, divide the total quantity by the number of units. For example, if you earn $20.40 in 3 hours, divide 20.40 by 3 to find the unit rate.

Front

If Alycia earned $20.40 in 3 hours, what is her unit rate in dollars per hour?

Back

$6.80 per hour.

Front

Which is the better buy: a 12 ounce can of corn for $1.92 or a 20 ounce can for $3.00?

Back

The 20 ounce can is the better buy.

Front

What is a rate in mathematics?

Back

A rate is a ratio that compares quantities with different units.

Front

If a cashier can ring up 2 customers in 8 minutes, how many customers can he ring up in 30 minutes?

Back

He can ring up 7.5 customers in 30 minutes.

Front

How do you determine which item is a better buy?

Back

To determine the better buy, calculate the unit price for each item and compare them.

Front

What is the unit price of a 12 pack of Coke for $3.50?

Back

The unit price is $0.29 per can.

Front

What is the unit price of a 6 pack of Coke for $1.80?

Back

The unit price is $0.30 per can.

Front

Which is the better buy: a 12 pack of Coke for $3.50 or a 6 pack for $1.80?

Back

The 12 pack of Coke is the better buy.