Rate Word Problems

Rate Word Problems

Lesson 57

Rate

• A rate shows a relationship between two different measurements

• One way to find rate is with "miles" and "hours"

Rate

• The car went 30 miles per hour

• This tells us that the car's rate is 30 miles each hour

• In other words, the car was able to drive 30 miles in each hour

• The words "miles per hour" mean "miles in each hour"

Example 1

• Johnny drove the car 45 miles per hour. How many miles did he drive in 2 hours?

• Pattern: Number in each time group x Number of time groups = total

• Problem: 45 miles per hour x 2 hours= 90 miles

• Johnny drove 90 miles in 2 hours!

There are other reasons to find the rate

You will calculate rate when you have a job to figure out how much money should be in your paycheck

Rate

• Gilbert earns $10 each week doing chores. How much money does he earn for doing 8 weeks of chores?

• Pattern: Number of groups x Number in each group = total

• 8 weeks x $10 per week = $80

• Gilbert earns $80 for doing 8 weeks of chores

Let's try a few examples!

Rate

• Amara can run 5 miles per hour. At that rate, how many miles can she run in 3 hours?

• Flip to the next slide to check your answer

Rate

5 miles per hour x 3 hours = 15 miles

Amara can run 15 miles in 3 hours

Rate

• Amara can ride her bike 20 miles in 1 hour. At that rate, how many miles can she ride her bike in 2 hours?

• Check your answer on the next slide

Rate

20 miles per hour x 2 hours = 40 miles

Amara can ride her bike 40 miles in 2 hours!

Let's try a few more!

Multiple Choice

Johnny earns $12 per hour working at the pet store. How much money does he earn for 8 hours of work?

• $20

• $96

• I'm not sure how to figure this out

Multiple Choice

Gilbert can walk 4 miles per hour. At this rate, how many miles can he walk in 4 hours?

• 16 miles

• 8 miles

• I'm not sure how to figure this out

Multiple Choice

Lucy earns $15 each day she walks her neighbor's dog. How much money does she earn for 6 days of walking the dog?

• $21

• $90

• I'm not sure how to figure this out

Open Ended

If some of this is confusing, don't worry! We will go back through the lesson together. If you have any questions, write them down here: