Ratios
Unit Rate
100

In a drawing, there are three circles, four stars, and three triangles. What is the ratio of stars to the total number of shapes.  Simplify

What is 4/10, 2/5

100
George read 126 pages of a book in 18 minutes. How many pages did he read in 1 minute?
7 pages per minute
200

Write a rate for this situation: 310 heartbeats in 5 minutes

310 to 5     or   62 to 1

200
The science materials cost $65.70 to do the experiment. If 9 students participated in the experiment, what was the unit cost per student?
$7.30
300

There are 3 white rabbits and 9 grey rabbits in a cage. Write the ratio of white rabbits to the total number of rabbits.  Simplify.

3 to 12,  1 to 4

300

The toys cost $69.95 for 5 models. What is the unit rate for each model toy?

$13.99 per model toy

400

The recipe calls for 2 eggs for every 8 cups of flour.  Write two equivalent ratios.

1 to 4 , 4 to 16, 6 to 26

400

The old factory produces 1500 mousetraps in 3 hours.  The new factory produces 2400 mousetraps in 4 hours.  Which factory is faster?  How do you know?

The new factory is faster.  The old factory produces 500 mousetraps per hour while the new factory can produce 600 per hour.  

500

Mr. Oz has 24 pink mice and 8 white mice.  Mrs. Fitts has 12 pink mice and 4 white mice.  Are the ratio of mice in each classroom the same?  Show how you know.  

Yes.  24 and 8 divided by 2 is equal to 12 and 4.

500

Hillary earned $45 babysitting for 6 hours.  Jose earned $56 for 8 hours.   Who was paid money per hour?  How do you know?

Hillary was paid more money per hour.  She made $7.50 per hour while Jose earned $7 per hour

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