How do you solve 12.5 + 7.8?

Work through it one step at a time — the interactive walkthrough above shows exactly how each step is calculated, not just the final answer.

What topic is "12.5 + 7.8" an example of?

This is a Decimals question, solved here with a step-by-step visual explanation.

Can I practise more questions like "12.5 + 7.8"?

Yes — use the "Ask your own question" box above to try any similar decimals question and get an interactive step-by-step solution.

Is "12.5 + 7.8" solved with a calculator, or manually?

The steps shown here are the same manual method a teacher would use at the board, so you can see how the answer is reached, not just what it is.

Why does showing each step matter for "12.5 + 7.8"?

Writing out each step makes it possible to check the working, catch mistakes early, and understand the method well enough to reuse it on a different question.

12.5 + 7.8

Step-by-step decimals solution

Adding decimals

12.5 + 7.8

Frequently asked questions

How do you solve 12.5 + 7.8?: Work through it one step at a time — the interactive walkthrough above shows exactly how each step is calculated, not just the final answer.
What topic is "12.5 + 7.8" an example of?: This is a Decimals question, solved here with a step-by-step visual explanation.
Can I practise more questions like "12.5 + 7.8"?: Yes — use the "Ask your own question" box above to try any similar decimals question and get an interactive step-by-step solution.
Is "12.5 + 7.8" solved with a calculator, or manually?: The steps shown here are the same manual method a teacher would use at the board, so you can see how the answer is reached, not just what it is.
Why does showing each step matter for "12.5 + 7.8"?: Writing out each step makes it possible to check the working, catch mistakes early, and understand the method well enough to reuse it on a different question.