# Add and Subtract Decimal Numbers

In this worksheet, students will try to work out the problem without a calculator, and then they work it through again using a calculator.

Key stage:  KS 3

Curriculum topic:   Number

Curriculum subtopic:   Use Four Operations for All Numbers

Popular topics:   Ratio worksheets

Difficulty level:

#### Worksheet Overview

In this activity, you can use a calculator to answer the questions.

Example

We must NOT work out 3.41 + 56 as one amount is in £s and the other in pence.

The answer is to be given in £s, so we change everything to pence.

56p is the same as £0.56

On the calculator, we add 3.41 + 0.56 = 3.97

Note that the answer is not 3.97 but £3.97

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