Interpret line plots with fraction addition and subtraction

The amount of rain that fell in Tokyo, Japan for $3$3 consecutive days is shown in the table below. The measurements are rounded to the nearest 1/2 of a centimeter.

What was the total rainfall during these 3 days?

Amy ran 8 miles. She recorded how long it took her to run each mile, rounded to the nearest 1/4 of a minute.

How long did it take Amy to run her slowest and fastest mile combined?

Students in Ms. Valendra’s science class planted 13 conifers in different places around the school yard. After one month, they measured the heights of the conifers. They rounded each measurement to the nearest 1/4 of an inch.

How much taller is the tallest conifer than the shortest conifer?

Ms. White measured the number of ounces of juice left behind by 3 students after breakfast. She plotted the data on the line plot shown below.

What is the total amount of juice that was left behind by the 3 students?

Pietro is measuring the thickness of his favorite books. He rounds his measurements to the nearest 1/8 inch and records the information on the line plot below.

What is the total thickness of the two thickest books?

The owner of a produce stand is selling bunches of grapes, priced by the pound. She rounded each measurement to the nearest  1/8 of a pound.

How much heavier is the heaviest bunch than the lightest bunch?

Chelsea records the number of quarts of water she gives her garden over 4 days. She rounds the measurements to the nearest  1/8 quart and then records the information on the line plot below.

What is the total number of quarts of water Chelsea used over these 4 days?

During science class, groups measure out different volumes of vinegar. The line plot below shows the amount of vinegar used by 12 groups, rounded to the nearest 1/2 mL

What is the total amount of vinegar, in milliliters, used by the 3 groups that used the most?

Eve surveys the students in her classroom to find out how much time they spent doing their homework last night. The results are plotted in the line plot below. The measurements are rounded to the nearest 1/4 of an hour.

What was the difference in time between the longest time and the shortest time?

Ted analyzes how much sugar is in 3 popular candy bars. He records the data on the line plot below.

How many total grams of sugar are in all 3 candy bars combined?

Scientists in Florida are measuring the masses of sea turtles as they hatch. They create a line graph and plots the masses of 18 turtles, rounded to the nearest 1/4 of an ounce.

What is the combined mass, in ounces, of the 3 lightest turtles?

The owner of a produce stand is selling baskets of peaches, priced by the kilogram. She rounded each measurements to the nearest 1/2 of a kilogram.

How much heavier is the heaviest basket than the second heaviest basket?

The masses of 4 samples of baking soda are measured to perform an experiment in science class.

What is the total number of grams of baking soda in all 4 samples?

Gino records how much milk his family drinks each week in February. He graphs the volumes, to the nearest 1/4 of gallon, on the line plot below.

What is the total volume of milk Gino’s family drank on the 2 weeks where they drank the most milk?

For 7 days, Tom recorded the number of hours he slept each night. He rounds each time to the nearest 1/4 of an hour.

How many more hours did Tom sleep on the night he slept the most than the night he slept the least?

The weights of 11 different babies are recorded on the line plot below. Each weight was rounded to the nearest 1/8 pound.

What is the difference, in weight, between the two heaviest babies?