Videos and lessons to help Grade 4 students learn to make a line plot to display a data set of measurements in fractions of a unit (1/2, 1/4, 1/8). Solve problems involving addition and subtraction of fractions by using information presented in line plots.
For example, from a line plot find and interpret the difference in length between the longest and shortest specimens in an insect collection.
Common Core: 4.MD.4
Suggested Learning Targets
Dylan was able to stay in the water 1 1/2 seconds longer than his friend Bryce. What are three possible times that Dylan and Bryce could have been in the lake?
possibility #1 

possibility #2 

possibility #3 

Dylan’s time 
Bryce’s time 

Dylan’s time 
Bryce’s time 

Dylan’s time 
Bryce’s time 
_____ sec 
_________ sec 

______ sec 
_________ sec 

______ sec 
_________ sec 
The troop leader said that he would donate an extra $100 to the charity if all the boys’ times add to a total over 30 seconds. Did the boys earn the extra $100?
Tell if their times add to a total of more than 30 seconds, and then explain how you know.
Activity 2:
Jasmine volunteers at an animal shelter. One of her jobs is weighing the kittens and keeping track of their weights. When Jasmine visited the shelter today, she weighed the kittens and made the line plot below to show the weights of the sixteen kittens.
When Jasmine got home, she
realized she forgot to write the
numbers on the scale below
the line plot. She remembered,
though, that the smallest kitten
weighed 3 pounds and that
four of the kittens weighed
3 3/4pounds.
Fill in the blanks to complete the scale of the line plot.
Explain how you figured out what numbers to place on the scale of the line plot.
Two of the kittens that Jasmine weighed, Butterscotch and Cocoa,
are brothers, but they don’t weigh
the same amount. Together, the
two kittens weigh 9 pounds. What
could the kittens’ weights be?
Milkshake and Oreo are the heaviest kittens that Jasmine
weighed Last week, Milkshake weighed 1 1/4 pounds less than he did today. What was Milkshake’s weight last week?