Matho: Rate and Unit Rate

Front

What is a rate?

Back

A rate is a ratio that compares two different quantities, often expressed as a fraction. For example, speed is a rate that compares distance to time.

Front

What is a unit rate?

Back

A unit rate is a rate in which the second quantity is one. It tells you how much of one item you get for one unit of another item.

Front

How do you calculate the cost per pound of an item?

Back

To calculate the cost per pound, divide the total cost of the item by its weight in pounds.

Front

If a 20-lb bag of dog food costs $23.44, what is the cost per pound?

Back

Cost per pound = $23.44 / 20 lbs = $1.172, rounded to $1.17.

Front

How do you find the total cost for multiple items?

Back

Multiply the cost of one item by the number of items you want to buy.

Front

If 6 bags of gravel cost $252, what is the cost of one bag?

Back

Cost of one bag = $252 / 6 = $42.

Front

How do you find the number of items you can buy with a certain amount of money?

Back

Divide the total amount of money by the cost of one item.

Front

If you can type 408 words in 4 minutes, how do you find words per minute?

Back

Divide the total words by the total minutes: 408 words / 4 minutes = 102 words per minute.

Front

What is the formula to find distance traveled at a constant speed?

Back

Distance = Speed x Time.

Front

If a plane travels 360 miles in 3 hours, what is its speed?

Back

Speed = Distance / Time = 360 miles / 3 hours = 120 miles per hour.