Adding and subtracting decimals

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

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


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
Remember all whole numbers have decimal places at the end of them, they are just not usually used.

Work out 4 - 2.3.

4 is the same as 4.0.

Example of long subtraction