Name _____________________________

Date ___________________

Fractions
(Answer ID # 0754984)
Complete.

1.   Catharina's father harvests ninety-six ears of maize every hour. How many ears does he harvest in four-fifths of an hour?

2.   Although playing chess doesn't intrigue Luis, he agreed to play a few games with Daniel. Daniel has a real knack for the game and easily defeated Luis every time they played. The first game lasted half of an hour. The second game took half of an hour and the third game was over in one and a half hours. How long did it take Daniel to defeat Luis all three times?

Complete.

3.   Some sea turtles can swim ten 80 times faster than tortoises can walk. Based on this information, if a sea turtle can swim at a rate of 25 MPH, at what rate can some tortoises walk? Express your answer as a fraction.

4.   If 85 out of 100 grasshoppers are immune to a pesticide after five years of use, how many would be expected to be immune in a population of 2.6 million after five years of use?

 

Complete.

5.   In examining a series of sediment layers in a canyon near the new BigTown geodesic dome, Hunter has been studying many layers of shale. He recently mapped all 12 of them. If a third of the layers are more than 300 million years old, how many layers are younger than 300 million years?

6.   Mr. Bloop is giving a demonstration using a water trough. This is a device used to observe (among other things) the action of water on sediments. He began with a flow rate of one and a third gallons per minute (gpm) and every thirty seconds he halved the rate. Throughout the demonstration the students watched small marked stones move down the trough. What was the flow rate (in gpm) after he halved the rate six times? Express your answer as a fraction.

Complete.

7.   Brianna estimates that two-fifths of a certain type of stone has a mass greater than three-eighths of a gram. If she has 520 of these stones, about how many stones have a mass less than or equal to three-eighths of a gram?

8.   Two objects (very tiny space ships actually) hit a wall. Object one applied a force of 8/13 of a Newton to the wall and object two applied a force of 6/7 of a Newton. Prove which one applied the larger force. (force = mass x acceleration)

Complete.

9.   A 500-gram package of growth powder made by Z-Globe contains 0.11% yeast extract by mass. What fraction of the powder is not yeast extract?

10.   In a chromatography column (basically a long thin tube) there is carbon dioxide flowing at a rate of 18 ml/min. If the maximum flow rate for the column is 126 ml/min, at what fraction of the maximum is the column currently operating? Express your answer as a fraction.

 

Complete.

11.   After a big storm, Mr. Bloop noticed that a lot of the sand from his volleyball pit had been blown away. He drove his pickup truck down to the local garden supply yard and purchased 10 truckloads of sand to add to the pit. His truck could carry 500 pounds of sand each time. The sand cost $147 per ton. Originally, it took 14 pickup truck loads to fill the pit. What fraction of the sand had been blown away by the storm?

12.   Rachel ran the 100 meters in 13.28 seconds. Her archrival Amber ran it in 1/2 of a second less. What was Amber's time?