Decimals

Word Problems

100

Estrella had $129.75 in her savings account.

• She deposited $15.85 into her account.
• Then she withdrew $45.50 from her account.
• Later, the bank added the quarterly interest of $0.98 to her account.

How much did Estrella have in her account after the quarterly interest was added?

$101.08

200

Last month Kim noticed that her car had no windshield washer fluid, so she poured 3.93 quarts of fluid into the windshield washer fluid tank.

 

This month she noticed that she had used 1.9 quarts of the fluid, so she added 1.78 quarts of windshield washer fluid in the tank.

How many quarts of windshield washer fluid does Kim's car have now?

3.81 Quarts

300

Ms. Ritz has 50 grams of salt to use for two science experiments. She used 12.7 grams of salt for the first experiment and 28.45 grams for the second experiment.

How many grams of salt did Ms. Ritz have left after the two experiments?

8.85 grams

400

Peter and his two sisters are saving to buy a computer.

• Peter has saved $45.47. 
• His older sister has saved $7.37 less than Peter.
• His younger sister has saved $3.60 less than her older sister.

How much total money have all three saved so far?

$118.07

500

On Saturday, Nick rode his bicycle a distance of 9 kilometers. On Sunday, Nick rode his bicycle a distance that is 0.72 kilometers shorter than the distance he rode on Saturday.

How far did Nick ride his bicycle on Saturday and Sunday combined?

17.28 kilometers

Find the Difference

100

The Austin 360 Amphitheater is a 1,500-acre sports and entertainment complex.

• The maximum number of tickets that can be sold for one event is 14,000 tickets.
• One week prior to the Summer Music Fest, 12,847 tickets had been sold.

How many more tickets can the Austin 360 Amphitheater sell without going over their maximum allowable ticket sales?

1,153 tickets

200

Andrea had $37.81 in her wallet.

• She paid $15 for a haircut.
• She bought 2 new shirts that cost $7.89 each.

How much money does Andrea have left in her wallet?

$7.03

300

Mr. Cardenas paid a total of $48.25 to mail three packages. He paid $16.15 to mail the first package and $18 to mail the second package.

 

How much did Mr. Cardenas pay to mail the third package?

$14.10

400

The owners of a business rented 4,506.23 square feet of space in an office building. They plan to use 281.6 square feet of the space for the kitchen.

How many square feet of space are left?

4,224.63 square feet

500

Last week a company sold $15,756.52 worth of merchandise online and $7,427 worth of merchandise in stores. What is the difference between the dollar amount of the online sales and the dollar amount of the in-store sales?

8,329.52

Find the Sum

100

What is the sum of this expression?

87.9 + 197.05 + 354 + 10.25

649.2

200

The number 1 seller at Kimmy’s Café is the Real Deal Breakfast Plate. The list shows the number of Real Deal Breakfast Plates sold so far this week.

• The café sold 174 plates on Monday.
• The café sold 219 plates each day on Tuesday and Wednesday.
• The café sold 186 plates on Thursday.

How many Real Deal Breakfast Plates has Kimmy’s Café sold so far this week?

798

300

There are two hiking trails in the park.

• Trail Y is 2.7 miles long
• Trail Z is 5.84 miles long

What is the total length of these two hiking trails?

8.54

400

Sandy purchased two patio chairs that cost $57.65 each and a table that cost $146.22. What is the total cost of these items?

$261.52

500

Mr. Patel is training for a bicycle race. In Week 1 he rode his bike 25.8 km. Every week after that he increased his distance by 1.75 km.

How many kilometers did Mr. Patel ride his bike in Week 4?

31.05 km

Bonus Problems

100

Nicholas collected 9.6 pounds of aluminum for a recycling project. The rest of his class collected 34.35 pounds of aluminum. The class goal is to collect 50 pounds of aluminum.

How many more pounds of aluminum does the class need to collect to meet this goal?

6.05 pounds

200

Carla and Gloria went to their favorite restaurant. Carla ordered a hamburger and an iced tea. Gloria ordered a small pizza and a soda.

 

• The hamburger cost $9.79.
• The small pizza cost $12.75.
• The iced tea cost $1.75.
• The soda cost $1.97.

What is the difference between the total cost of Carla’s food and drink and the total cost of Gloria’s food and drink?

3.18

300

Bridget made curtains by sewing two lengths of fabric together.

 The red fabric was 133.4 cm long.

• The white fabric was 87.8 cm long.

After the two lengths of fabric were sewn together, Bridget realized the curtains were too long. She cut 48 cm off the total length.

How long were the finished curtains?

173.2

400

The list shows the number of visitors who arrived and the number of visitors who left a science museum for the first three hours after it opened one day.

• In the first hour, 294 visitors arrived.
• In the second hour, 408 visitors arrived and 89 visitors left.
• In the third hour, 313 visitors arrived and 175 visitors left.

How many visitors were in the science museum after the third hour?

751

500

Sandersonville Elementary School will be taking the students in fourth and fifth grade on a field trip to the zoo.

• There are 187 students in fourth grade.
• There are 205 students in fifth grade.
• 43 students will not be able to attend the field trip.

How many students will be attending the field trip to the zoo?

349