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Decimals - AQAAdding and subtracting decimals

Decimals are used every day, for example, when using money. Knowing how to use decimal points and places when adding, subtracting, dividing and multiplying is an important mathematical skill.

Part of MathsNumber

Adding and subtracting decimals

Adding and subtracting decimals works exactly the same way as adding and subtracting whole numbers or .

When adding and subtracting decimals it is important to keep the decimal points in line with each other.

Examples

Calculate \(3.6 + 14.73\).

Make sure that units line up with units, tenths line up with tenths and so on. Use zeros as placeholders if you need to.

Example of long addition

Work out \(4 - 2.3\).

4 is the same as 4.0.

Example of long subtraction