How to calculate 12 plus 15 using Long Addition




Here we will show you step-by-step how to calculate 12 plus 15 (12 + 15) using the Long Addition Method. We start by setting up our math problem as follows:

              1 2
      +       1 5
                 

The next step is to add the ones digits together (2 + 5 = 7) like this:

              1 2
      +       1 5
                7

Then in our final step, we add the tens digits together (1 + 1 = 2) like this:

              1 2
      +       1 5
              2 7

And that is how you solve 12 plus 15 using the Long Addition Method! The answer is displayed mathematically below:

12 + 15 = 27


Long Addition Calculator
Here you can enter another addition problem for us to explain and solve using the Long Addition Method:

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How to calculate 12 plus 16 using Long Addition
Here is the next math problem we solved using the Long Addition Method.


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