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2012 OAA Review Stations. 7 th Grade Math. Station #3. Number Sense. 2. Find the value of the expression: . 2.4 2.8 3.6 5.4. index. 3. A microwave oven costs $92. It is on sale for 15% off. Which proportion can be used to find the final price (n) of the microwave oven?. 85/100 = n/92
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2012 OAA Review Stations
7th Grade Math
Station #3
Number Sense
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7. An airline has 400 flights a day. Of these, 80% depart before 6 p.m. Flights leaving before 6 p.m. depart on schedule ¾ of the time. How many flights leaving before 6 p.m. depart on schedule each day?
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9. Jackson has a board that is 6 ½ feet long. He needs a board that is ¼ of this length. What is the length of the board that Jackson needs?
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10. During a quality control check, a factory found that 5% of the parts it produces are defective. The factory recently completed an order for 144,000 parts. Approximately how many of the parts from the order may be defective?
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Station #4
Measurement
1. At 7:00 a.m. the temperature was 55o. The temperature was 72ºF at 3:00 p.m. Which is the most appropriate way to describe the average rate of change in temperature?
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2. Aaron is tiling a floor. The floor measures 6 feet by 5 feet. Aaron is using square tiles with sides that measure 3 inches. How many tiles will it take to cover the entire floor?
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5. Dave wants to estimate the distance from Harrisburg to Jonestown. The distance on the map is about 13 inches. The scale on the map indicates that 2.5 inches = 6 miles. About how many miles is it from Harrisburg to Jonestown?
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9. A packing company is changing the size of a shipping carton. The carton is in the shape of a rectangular prism. The height of the carton will be doubled and the width will be tripled. By what scale factor will the volume of the original carton increase?
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Station #5
Geometry
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2. Coral was asked to draw a rhombus on the chalkboard.Coral drew a square.Ken told Coral that she didn’t draw a rhombus. Coral responded, “A square is a rhombus.” Which statement supports Coral’s reasoning that a square is a rhombus?
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4. Jason made a model stop sign for his model train set. An actual stop sign measures 12 inches on each side. Jason’s model stop sign measures ½ inch on each side. What is the scale of the model sign to the actual sign?
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8. Lance is 5 feet tall. His shadow is 8 feet long. At the same time of day, a tree’s shadow is 32 feet long. What is the height of the tree?
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9. Triangle LMN is shown on the graph. Triangle LMN is translated three units to the right and two units down. What are the coordinates of the vertices for triangle L′ M ′ N ′?
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Station #6
Patterns, Functions, & Algebra
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4. Kwame bought three rose bushes and two maple trees. Each rose bush costs $15. Kwame spent a total of $67. Let t represent the cost of one maple tree. Which equation is one way to represent this situation?
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7. A shipping company uses a formula to determine the cost for shipping a package: c = 2.79 + 0.38p, where c is the cost of shipping and p is the number of pounds. What is the cost of shipping a package that weighs 8 pounds?
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Station #7
Data Analysis
Emily earns $12 every week. The circle graph shows how Emily uses her money each week. Emily claims that she only spends about $10.00 each week. Which statement supports Emily’s claim?
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4. Manny surveyed 24 of his classmates about their vacation plans. The bar graph shows the results. Manny’s class is representative of the entire school. What is a reasonable estimate for how many of the 300 students in the school have no vacation plans?
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8. Tony has one green, one white, one red and one blue shirt. He also has one pair of black jeans and one pair of blue jeans. He randomly chooses a shirt and a pair of jeans from his closet. What is the probability that Tony chooses a white shirt and a pair of blue jeans?
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10. Robyn rolled a number cube 60 times in an experiment. Her results are shown in this table. What was the experimental probability of rolling a 6?
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