Double Number Lines Practice
Name ______________________________
Notes:
1. Double number line diagrams are best used when ______________________________
_______________________________________________________________________.
2. Double number line diagrams can help us to ___________________________________
_______________________________________________________________________.
In our Running Rate mini project, we discovered how many seconds it took us to run 100
meters. According to the double number line below:
How long does it take the runner to run 15 meters? _____________
How many meters can the runner run in 4 seconds? _____________
How long would it take the runner to run 25 meters? ____________
Example #1: There are 4 apples on each plate.
If there are 6 plates, how many apples are there altogether? ______________
If you had 3 plates, how many apples would there be? ________________
Add this new information to the number lines.
Example #2: A car travels at a speed of 30 miles every 3 hours.
At what rate is the car moving (every 1 hour)? _______________
How many hours will it take for them to drive 50 miles (you may need to estimate)? _________
Add this new information to the number lines.
Solve each of these problems using a double number line. You may have to estimate on some
of them.
1. There are 24 students in a classroom and 6 large round tables. How many children should be
seated at each table if there must be the same number of children at each table?
2. Rayelle takes inventory of her closet and discovers that she has 8 shirts for every 5
pair of jeans. If she has 40 shirts, how many pairs of jeans does she have?
3. A lawyer earns $1500 for every 40 hour work week. What is the unit rate in dollars per hour?
About how many weeks will it take to earn $5000?
4. At Vons, apples cost $2.59 for 3 pounds. How much is this per pound? About how
many pounds can you get for $7
5. My car’s odometer told me that I drove 155 miles in 3 hours. What was my unit rate in miles
per hour?
Name________________________ Date______________ Class__________________________
Early Finishers
The data transfer rate of an Internet connection is the rate in bytes per second that a file can be
transmitted across the connection. Data transfer is typically measured in kilobytes (KB) per
second, or megabytes (MB) where 1 MB = 210 KB = 1024 KB. Suppose the data transfer rate of
your internet connection is 500 KB per second. Draw a double number line to represent this
situation:
a. How long will it take to download a music file that is 5 MB?
b. How long will it take to download a video file that is 100 MB?