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 one unit. For example, if a car travels 300 miles in 5 hours, the unit rate is 60 miles per hour.

Front

How do you calculate the unit rate?

Back

To calculate the unit rate, divide the first quantity by the second quantity. For example, if you have 10 apples for $5, the unit rate is $5 ÷ 10 apples = $0.50 per apple.

Front

What does 'better buy' mean?

Back

'Better buy' refers to the option that offers more value for the price paid, often determined by comparing unit rates.

Front

How do you determine which option is a better buy?

Back

To determine the better buy, calculate the unit rate for each option and compare them. The option with the lower unit rate is the better buy.

Front

If 27 ounces of nacho chips cost $3.51, what is the unit rate?

Back

Unit rate = $3.51 ÷ 27 ounces = $0.13 per ounce.

Front

If 10 ounces of nacho chips cost $1.30, what is the unit rate?

Back

Unit rate = $1.30 ÷ 10 ounces = $0.13 per ounce.

Front

Which is a better buy: 15 kg of tomatoes for $32.25 or 4 kg for $8.72?

Back

15 kg for $32.25 is the better buy because it has a lower unit rate.

Front

How do you compare prices of different quantities?

Back

Convert the prices to a common unit (e.g., price per pound, price per ounce) to compare them effectively.

Front

What is the unit rate for $16.52 per 6 yards of cloth?

Back

Unit rate = $16.52 ÷ 6 yards = $2.75 per yard.

Front

What is the unit rate for $13.85 per 5 yards of cloth?

Back

Unit rate = $13.85 ÷ 5 yards = $2.77 per yard.