Understanding Rates
What is a rate?
A comparison of two different kinds of units (like miles per hour).
If you read 20 pages in 4 minutes, how many pages do you read per minute?
5 pagers per minute
If you travel 10 miles in 1 hour, what is your speed?
10 mph
If apples cost $2 per pound, how much does 1 pound cost?
$2
Which of these is a rate?
A) 5 apples
B) 6 miles in 2 hours
6 miles in 2 hours
A car travels 60 miles in 3 hours. What is the unit rate?
20 mph
A bike travels 24 miles in 2 hours. How fast is the bike going?
12 mph
You buy 3 notebooks for $6. How much does 1 notebook cost?
$2
What are the two units being compared in $12 for 3 tickets?
dollars and tickets
You earn $15 for 5 hours of work. How much do you earn per hour?
$3 per hour
If a runner goes 5 miles per hour, how far will they go in 4 hours?
20 miles
A machine makes 40 toys in 8 minutes. How many toys does it make per minute?
5 toys per minute
Is 10 pages per minute a rate? Explain why or why not.
Yes, because it compares pages and minutes (two different units).
A frog jumps 18 feet in 6 seconds. What is the unit rate?
3 feet per second
A car travels 90 miles at a speed of 30 miles per hour. How long does the trip take?
3 hours
A car uses 12 gallons of gas to go 300 miles. How many miles does it go per gallon?
25 miles per gallon