FLASHCARD review: Solving Rate Problems

Front

What is a rate problem?

Back

A rate problem involves finding a relationship between two quantities, often expressed as a ratio, such as speed, cost per item, or copies per minute.

Front

How do you calculate the total output in a rate problem?

Back

To calculate total output, multiply the rate (output per unit of time) by the total time.

Front

If a machine prints 360 copies in 3 minutes, what is its rate of printing?

Back

The rate is 120 copies per minute (360 copies ÷ 3 minutes).

Front

How do you find the unit price of an item?

Back

To find the unit price, divide the total price by the number of units (e.g., price per gallon, price per pound).

Front

What is the unit price of Sara Lee Turkey at $6.58 per lb?

Back

The unit price is $6.58 per lb.

Front

If 12 gallons of gas cost $33, what is the price per gallon?

Back

The price per gallon is $2.75 ($33 ÷ 12 gallons).

Front

How do you compare two rates to find the better deal?

Back

Calculate the unit price for both options and compare them; the lower unit price is the better deal.

Front

If a teacher printed 720 copies at a rate of 360 copies every 3 minutes, how long did it take?

Back

It took 6 minutes (720 copies ÷ 120 copies per minute).

Front

How many words can Sarah type in 5 minutes if she types 110 words in 2 minutes?

Back

Sarah can type 275 words in 5 minutes.

Front

What is the formula to find the total time taken in a rate problem?

Back

Total time = Total output ÷ Rate of output.