Adding Decimals Step-by-Step Example
22 October 2026
Adding decimals can seem tricky at first, but it becomes much easier when you follow a clear method. Here is a step-by-step example to help your child see exactly how to add decimal numbers.
Worked example
Add 2.5 and 1.3
Step 1: Line up the decimal points.
Step 2: Add the digits after the decimal point: 5 + 3 = 8.
Step 3: Add the digits before the decimal point: 2 + 1 = 3.
The correct answer is 3.8.
| Step | Calculation | Result |
|---|---|---|
| Add tenths | 5 + 3 | 8 |
| Add units | 2 + 1 | 3 |
| Final answer | 3.8 |
Key insight: When your child adds decimals, lining up the decimal points keeps everything in the right place. Now your child can spot how to add tenths and units one by one. They are ready to try similar questions on their own.
