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Fractions
Mathématiques
Middle School Math
Fractions

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 Name _____________________________ Date ___________________
Fractions
Complète.
 1 Mackenzie likes to ice skate better than roller skating. She said she could go faster on ice skates. If it takes her ninety-two seconds to skate around an ice rink that isun tiersof a mile around, how long would it take her to skate two miles? Round your answer to the nearest minute.
 2 Problem: A big grand opening sale is scheduled for the new Megamart in Math City. The sale begins at 10:19 a.m.! You and your friend have been waiting in line since 6:47 a.m. Your friend turns to you after looking at her watch and says, "well, the wait is half over!" What time is it now?

Complète.
 3 Ranger Roger has counted about40% of the scrum trees in Vista Park today. He has this chore of counting the1,200scrum trees three times a year. If this is his second count this year, what fraction of the total number of scrum trees has he counted so far?
 4 If82sur100grasshoppers are immune to a pesticide after five years of use, how many would be expected to be immune in a population of2.6million after five years of use?

 Key #2
Complète.
 5 M. Bloop fait une demonstration avec un bac d'eau. Ceci est utilisé pour observer l'action d'eau sur des sédiments (parmi d'autres choses). Il a commencé avec le taux d'écoulement deone and four-seventhsgallons 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 three times? Express your answer as a fraction.
 6 Dans le lit d'un ruisseau,1/6de gravier mesure moins de5mm en diamètre et1/2de cela est entre5et10mm en diamètre. Quelle fraction du gravie mesure plus d'un centimètre en diamètre ?

Complète.
 7 A bus is making a trip from Bigtown to Megacity. The average round trip speed is always51MPH on this journey. The round trip distance is126miles. At Megacity the bus waits exactly25minutes and then returns to Bigtown. If the bus has completed2/3of this entire journey, how long has it been since it left Bigtown on the way to Megacity? Round your answer to the nearest minute.
 8 Isaac is hiking in the national park. He is on a6 3/4-mile hike and he makes four evenly spaced rest stops along the way. At what mile of the hike does he make his last stop?

Complète.
 9 A mixture of organic compounds is distilling. As the boiling point of each compound in the mixture is reached, the liquid boils at that temperature until the entire compound is gone and then the temperature rises to the boiling point of the next higher boiling compound. Compound-A boiled at60C et maintenant la température a monté à82C and stabilized. The Boiling point of compound-B is0C. From this we can conclude that the boiling point of compound-A is _________________ of the boiling point of compound-B. (Note: Fill in the blank above with a fraction that makes the statement true)
 10 Three labs measured the iron content of an ore sample sent to them by Terra-Chem, Inc. The first lab reported23mg de fer par cm3. The second lab reported a concentration of9/10celui-là et le troisième laboratoire trouva une valeur d'environ1 1/5of the value reported by lab 2. What was the iron concentration reported by lab 3? Round your answer to the nearest hundredth of a milligram.

 Key #2
Complète.
 11 Anna is training hard during the off-season to become a better pitcher. She spends8hours a week pitching,5hours a week running, and2hours a week lifting weights. What fraction of her training time is spent on pitching?
 12 Ten people have signed up for the bowling tournament at Snookie's Bowling Alley and Arcade. This is about9/16of the maximum number of people allowed in the tournament. How many more can still sign up?

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