Unit Rates
Proportions
Population Size
Scale Factor
Ratios
100
If 8 batteries cost 16 dollars, what is the price per battery?
What is $2.00
100
If you can buy one can of pineapple chunks for $2 then how many can you buy with $10?
What is 5 cans
100
While studying a population of porcupines, a group of scientists caught and tagged 28 porcupines. A week later, the scientists counted 540 porcupines and saw that 18 of them had tags. To the nearest whole number, what is the best estimate for the porcupine population?
840 porcupines
100
Lexi made a scale drawing of a county park. She used the scale 1 inch = 3 yards. In the drawing, the picnic area is 39 inches long. What is the length of the actual picnic area?
117 yards
100
Are the ratios 4:20 and 1:4 equivalent?
No
200
If it snows 6 inches in 8 hours, what rate is the snow falling at?
What is 0.75 inches per hour?
200
Ming was planning a trip to Western Samoa. Before going, she did some research and learned that the exchange rate is 6 Tala for $2. How many Tala would she get if she exchanged $6?
What is 18 Tala
200
A group of sixth-grade volunteers helped determine the lizard population of a local park. First, adult volunteers marked 36 lizards. Then, the student volunteers counted a total of 450 lizards in the park, 27 of which were marked. To the nearest whole number, what is the best estimate for the lizard population?
600 lizards
200
The scale of a map is 9 cm = 18 mi. If two cities are 3 cm apart on the map, how far are they in real life?
What is 6 mi
200
Are the ratios 3:4 and 5:20 equivalent?
No
300
If your car can go 85 miles on 4 gallons of gas, what is your average gas consumption in miles per gallon?
What is 21.25 miles per gallon
300
The currency in Argentina is the Peso. The exchange rate is approximately $3 = 1 Peso. At this rate, how many Pesos would you get if you exchanged $121.10? Round your answer to the nearest tenth.
What is 40.4 Pesos
300
While doing research on a local lake, a group of university researchers tagged 950 walleye. Later, they captured 390 walleye, of which 39 had tags. To the nearest whole number, what is the best estimate for the walleye population?
9500 walleye
300
Ryan creates a scale drawing of his house. He uses the scale 1 inch = 3 feet. His front door is actually 12.6 feet tall. How many inches will it measure in his drawing?
What is 4.2 in
300
Find the number that makes the ratio equivalent to 1:6. 8:___
48
400
Joey paid $11.20 for 8 pounds of tomatoes. What is the unit cost of tomatoes?
What is $1.40
400
In a shipment of 400 parts, 14 are found to be defective. How many defective parts should be expected in a shipment of 1000 parts?
What is 35
400
For a research project on rodents, 36 chipmunks were tagged and released. Later, researchers counted 260 chipmunks in the area. Of the chipmunks they counted, 24 had tags. To the nearest whole number, what is the best estimate for the chipmunk population?
390 chipmunks
400
A map has a scale of 1 inch = 25 miles. The distance on the map between two cities is 3 1/2 inches. How far apart are the two cities?
What is 87.5 miles
400
Are these ratios equivalent? 6 friends to 12 family members 5 friends to 10 family members
Yes
500
Margaret typed continuously for 8 minutes. After 8 minutes, he had typed 458 words. What is the unit rate for words he can type per minute?
What is 57.25 words per minute
500
Molly bought two heads of cabbage for $1.80. How many heads of cabbage can Willie buy if he has $28.80?
What is 32
500
A country in Africa is trying to restore its zebra population and is carefully keeping track of how many zebras are in the area. To do so, local wildlife authorities put tags on 25 zebras and release them. Later, they corral 600 zebras; among those zebras, 10 were tagged. To the nearest whole number, what is the best estimate for the zebra population?
1500 zebras
500
A drawing of a square room has a scale of 1 inch=5 feet. If the real length of one wall is 6.5 feet, what is the perimeter of the room on the drawing?
What is 5.2 inches (1.3 = 1 side, the perimeter is all 4 walls)
500
Find the number that makes the ratio equivalent to 3:4. 9:
12
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