Unit Rates - Pre Algebra

1. A car travels 240 miles in 4 hours. What is its unit rate in miles per hour?

   60 miles per hour. $240 \div 4 = 60$.

2. Which is the better buy: 12 ounces for 3 dollars or 16 ounces for 3.20 dollars?

   16 ounces for 3.20 dollars. It costs 0.20 dollars per ounce, while the other costs 0.25 dollars per ounce.

3. How do you find the unit price of an item sold in a package?

   Divide the total price by the number of units. The result is the price for 1 unit.

4. A worker earns 84 dollars for 7 hours of work. What is the hourly rate?

   12 dollars per hour. $84 \div 7 = 12$.

5. A heart beats 18 times in 15 seconds. At that rate, how many beats is that per minute?

   72 beats per minute. One minute is 4 times 15 seconds, and $18 \times 4 = 72$.

6. Six apples cost 3 dollars. What is the price per apple?

   0.50 dollars (50 cents) per apple. $3 \div 6 = 0.5$.

7. A car uses 3 gallons of gas to travel 96 miles. What is its rate in miles per gallon?

   32 miles per gallon. $96 \div 3 = 32$.

8. A student types 360 words in 8 minutes. What is the typing rate in words per minute?

   45 words per minute. $360 \div 8 = 45$.

9. A worker earns 12 dollars per hour. How much does the worker earn in 5.5 hours?

   66 dollars. Multiply the unit rate by the hours: $12 \times 5.5 = 66$.

10. What is a unit rate?

    A rate that compares a quantity to exactly 1 unit of another quantity, such as 60 miles per 1 hour.

11. Five pounds of potatoes cost 4 dollars. What is the price per pound?

    0.80 dollars per pound. $4 \div 5 = 0.8$.

12. When comparing two package sizes of the same product, which one is the better buy?

    The one with the lower unit price, because it costs less for each unit of the product.

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