# Worksheet: Adding and Subtracting Decimals

Q1:

Calculate the following: .

Q2:

Complete .

Q3:

Calculate .

Q4:

Calculate .

Q5:

Calculate the following: .

Q6:

Calculate .

Q7:

Calculate the following: .

Q8:

What is the result of ?

Q9:

Calculate .

Q10:

Calculate .

Q11:

Calculate .

Q12:

.

Q13:

A lion ate 11.4 kg of meat one day and 14.6 kg of meat the next day. How many kilograms of meat did it eat across the two days?

• A 16.64 kg
• B 3.2 kg
• C 2.6 kg
• D 26 kg

Q14:

One basket contains 24.1 kg of apples. Another basket contains 21.5 kg of apples. What is the total weight of the apples in the baskets?

• A 518.15 kg
• B 2.6 kg
• C 51.81 kg
• D 45.6 kg
• E 456 kg

Q15:

On a dive, some oceanographers saw a humpback whale which was 13.7 m long, and a killer whale which was 6.85 m long. How much longer was the humpback whale than the killer whale?

Q16:

Between 2017 and 2050, the world’s population is expected to increase by 2.3 billion. Given that the world’s population in 2017 was 7.5 billion, what is the predicted population in 2050?

Q17:

Sophia wanted to buy some snacks and juice. If she had \$25 and bought some fruits for \$14.35 and a gallon of apple juice for \$2.22, find how much she would have after paying.

Q18:

Mason bought a tie for \$14.51 and a shirt for \$23.38. Determine how much he will get back if he pays with a \$50 bill.

Q19:

Use the table below to find out how many more people there are per square mile in Iowa than in Colorado.

 State Number of People Per Square Mile Colorado Iowa Arkansas Oklahoma 41.5 52.4 51.3 50.3

Q20:

The table shows the top three times for the women’s 100-meter butterfly event at the 2004 Summer Olympics.

Swimmer Country Time (s)
Petria Thomas Australia 57.47
Otylia Jedrzejczak Poland 57.84
Inge de Bruijn Netherlands 57.99

What is the difference between Petria Thomas’ time and Otylia Jedrzejczak’s time?

Q21:

Sophia goes jogging every day. If she jogged for 12 hours this week, complete the given table.

 Day Number of Hours Monday Tuesday Wednesday Thursday Friday Saturday Sunday 0.5 1 3 1.5 1 2