# 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?

• A2.6 kg
• B26 kg
• C16.64 kg
• D3.2 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?

• A456 kg
• B51.81 kg
• C45.6 kg
• D518.15 kg
• E2.6 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:

Karen 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:

If Michael scored a total 400 points or more on his math tests for the first five weeks of the quarter, his father would take him to a basketball game. Michael scored 70.9, 85.4, 86.6, 86.3, and 72.4 on the five tests. By how many points did Michael earn the reward?

Q20:

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

Q21:

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

SwimmerCountryTime (s)
Petria ThomasAustralia57.47
Otylia JedrzejczakPoland57.84
Inge de BruijnNetherlands57.99

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

Q22:

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