Challenge Exercises for Multiplying and Dividing Decimals

Directions: Read each question below. You may use paper and pencil to help you solve these problems. Click once in an ANSWER BOX and type in your answer; then click ENTER. Do not use commas in your answers, just digits. After you click ENTER, a message will appear in the RESULTS BOX to indicate whether your answer is correct or incorrect. To start over, click CLEAR.

1.	Ronnie’s high school ran a carwash. If he bought 25 bottles of soap at $2.95 each, then about how much did he pay? ANSWER BOX: $ RESULTS BOX:

2.	About how far can you travel on 14.5 gallons of gas if your hybrid car gets 45.6 miles per gallon? ANSWER BOX: miles RESULTS BOX:

3.	Charlie is paid $17.75 per hour and worked 42.5 hours last week. How much money did he earn last week (rounded to the nearest cent)? ANSWER BOX: $ RESULTS BOX:

4.	An airplane traveled 2,781.2 miles in 6.5 hours. Estimate the average speed of the plane in miles per hour. ANSWER BOX: mph RESULTS BOX:

5.	There are 9 people on an elevator. Together they weigh 1,235.52 lbs. Find the average weight. ANSWER BOX: lbs. RESULTS BOX:

6.	Six wheel barrows of firewood cost $189.95. Rounded to the nearest cent, how much does one wheel barrow cost? ANSWER BOX: $ RESULTS BOX:

7.	Lenny worked 15 days for a total of 133.75 hours. How many hours did he average per day? Round your answer to the nearest tenth. ANSWER BOX: hours RESULTS BOX:

8.	Jenny has 75.9 lbs. of coffee. If she places the coffee into 3.2-lb. bags, then how many bags will she need? ANSWER BOX: RESULTS BOX:

9.	Lilly has 175.35 gallons of spring water. If she pours the water into 1.5-gallon containers, then how many containers will she need? ANSWER BOX: RESULTS BOX:

10.

Gold costs $804.10 per ounce. If Jeanne purchased $4,189.36 of gold, then how many ounces of gold did she get (round your answer to the nearest tenth)?