Directions: Use your decimal skills to calculate the answers to the following problems. The first five problems have hints to get you started.

1) Eric studied for 17.5 hours for a period of 4.5 days. On the average, how much did he study each day?

(Hint: 4.5 is what percentage of 17.5?)

2) If licorice cost $6.59 a pound, how much would it cost to buy a quarter pound of licorice?

(Hint: Convert the mixed fraction to an improper fraction or decimal and multiply by the quantity required.)

3) If your weekly salary is $415.00, how much do you take home each week after deductions are made for federal income tax of $82.13, state tax of $9.74, social security and Medicare tax of $31.75, and retirement plan deduction of $41.50.

(Hint: Add all of the deductions, then subtract from the weekly salary.)

4) Carpeting costs $7.99 a yard. If Jan buys 12.4 yards, how much will it cost her?

(Hint: Round it to two decimal places)

5) If 58 out of 100 students in a school are boys. Write decimal expression for the part of the school that consists of boys.

(Hint: 58 is what percentage of 100?)

6) All the people of a neighborhood pooled together and won the lottery. They won $10,000,000 and each person got a 0.02 share. How much money did each person receive?

7) Sally scored 9.007 in gymnastics. Jack scored 8.949. How much higher was Sally's score than Jack's?

8) If you had a half a dollar, three quarters, eight dimes, six nickels, and nine pennies, how much money would you have all together?

(Hint: Add 0.50, 0.75, 0.80, 0.30 and 0.09)

9) Kim's scores in the diving competition were 7.2, 6.975, 8.0, and 6.96. What is her total score?

10) A computer processes information in nanoseconds. A nanosecond is one billionth of a second. Write this number as decimal.

11) Five swimmers are entered into competition. Four of the swimmers have had their turns. Their scores are 9.8s, 9.75 s, 9.79 s and 9.81. What score

must the last swimmer get in order to win the competition?

12) To make miniature ice cream truck, you need tires with a diameter between 1.465 cm and 1.472 cm. Will a tire that is 1.4691 cm in diameter work?

13) Ellen wanted to buy the following items: A DVD holder for $19.95, headphones for $41.25, and personal stereo for $30.65. How much money does Ellen need?

14) What is combined thickness of these shims: 0.008, 0.125, 0.15, 0.185 and 0.005 cm?

15) Melissa purchased $39.46 in groceries at a store. The cashier gave her $1.46 in change from $50 bill. How much change should Melissa get from the cashier.

16) Brandon is training for 200 meter dash. His best running time so far was 31.25 seconds. If Brandon wants to run the dash in 27 seconds, how much time must he cut in order to reach his goal?

17) A cylinder is normally 3.4375 cm in diameter. If it is remade to be 0.095 cm larger, what is the new size of the cylinder?

18) The times for three runners in a 100 yard dash are 9.85 s, 9.6 s and 9.625 s. What is the winning time?

19) If a 10 foot piece of electrical tape has 0.037 feet cut from it. What is the new length of tape?

20) A director replayed 231 of the 1000 scenes filmed for a movie. Write a decimal to represent the part of movie the director replayed.