Primary School · Mathematics

Decimals (Mixed operations of addition and subtraction): Practice Questions

5 multiple-choice questions marked as you go, and 3 written questions with worked solutions. All on Decimals (Mixed operations of addition and subtraction).

8 questions16 marksFree, no account

Question 1

1 mark

Calculate the following expression:
\(5.4 + 2.8 - 3.1\)

Question 2

1 mark

A wooden board is \( 9.2 \text{ m} \) long. A carpenter cuts off a piece of \( 3.65 \text{ m} \) and another piece of \( 2.8 \text{ m} \). What is the length of the remaining board?

Question 3

1 mark

There were \(20.5\) L of water in a tank. \(8.75\) L was poured out in the morning, and \(12.4\) L was added in the afternoon. How much water is in the tank now?

Question 4

1 mark

Find the value of \(12.75 - 4.2 + 1.15\).

Question 5

1 mark

Solve the following mixed operation:
\(15 - 6.45 + 2.8\)

Question 6

3 marks

Find the value of \( 45.3 - 12.85 + 7.4 \).

Write your answer out first, then check it against the worked solution.

Question 7

4 marks

A student tracks the volume of liquid in a container during a science experiment. The container initially has \( 8.4 \text{ L} \) of liquid. Over three steps:

- Step 1: \( 3.75 \text{ L} \) is poured out.
- Step 2: \( 12.65 \text{ L} \) is added.
- Step 3: \( 6.9 \text{ L} \) is poured out.

a) Find the volume of liquid in the container after Step 2.

b) Find the final volume of liquid in the container after Step 3.

Write your answer out first, then check it against the worked solution.

Question 8

4 marks

A fruit vendor had \( 60 \text{ kg} \) of oranges. On Monday, he sold \( 24.35 \text{ kg} \). On Tuesday, he sold \( 18.9 \text{ kg} \). On Wednesday, a new shipment of \( 35.5 \text{ kg} \) was added to the stock.

a) What was the total weight of oranges sold on Monday and Tuesday combined?

b) How many kilograms of oranges were in stock at the end of Tuesday?

c) What was the final weight of oranges in stock after the shipment arrived on Wednesday?

Write your answer out first, then check it against the worked solution.

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