Rates, unit rates and better buy

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 a quantity of one. For example, if you can buy 9 cookies for $1, the unit rate is 9 cookies per dollar.

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 you buy 36 cookies for $4, the unit rate is 36 cookies ÷ 4 dollars = 9 cookies per dollar.

Front

What is the unit rate of $200 for 8 hours of work?

Back

The unit rate is $200 ÷ 8 hours = $25 per hour.

Front

Which is the better buy: 4 t-shirts for $2.24 or 6 t-shirts for $3.12?

Back

The better buy is the 6-pack of t-shirts for $3.12, as it costs $0.52 per t-shirt compared to $0.56 per t-shirt for the 4-pack.

Front

How do you find the unit price of an item?

Back

To find the unit price, divide the total price by the total weight or quantity. For example, if Doritos cost $4.39 for 11.5 oz, the unit price is $4.39 ÷ 11.5 oz = $0.38 per oz.

Front

What is the unit price of Cheetos that cost $2.24 for 9.75 oz?

Back

The unit price is $2.24 ÷ 9.75 oz = $0.23 per oz.

Front

If you spend $40 on 5 pounds of concrete, what is the unit rate in dollars per pound?

Back

The unit rate is $40 ÷ 5 pounds = $8 per pound.

Front

What is a better buy: 8-pack of t-shirts for $4.24 or 6-pack for $3.12?

Back

The better buy is the 6-pack for $3.12, as it costs $0.52 per t-shirt compared to $0.53 per t-shirt for the 8-pack.

Front

What does 'better buy' mean?

Back

'Better buy' refers to the option that offers the lowest cost per unit, making it the more economical choice.

Front

How do you compare prices to find the better buy?

Back

To compare prices, calculate the unit price for each option and choose the one with the lowest unit price.