Here we will show you step-by-step how to calculate 18 plus 12 (18 + 12) using the Long Addition Method. We start by setting up our math problem as follows:
| 1 | 8 | |||||||
| + | 1 | 2 | ||||||
The next step is to add the ones digits together (8 + 2 = 10). Since the sum creates 1 tens digit, we put the 1 in the tens column, and the 0 at the bottom of the ones:
| 1 | ||||||||
| 1 | 8 | |||||||
| + | 1 | 2 | ||||||
| 0 |
Then in our final step, we add the tens digits together (including the 1 from the previous step): 1 + 1 + 1 = 3 and put that sum at the bottom:
| 1 | ||||||||
| 1 | 8 | |||||||
| + | 1 | 2 | ||||||
| 3 | 0 |
And that is how you solve 18 plus 12 using the Long Addition Method! The answer is displayed mathematically below:
18 + 12 = 30
Long Addition Calculator
Here you can enter another addition problem for us to explain and solve using the Long Addition Method: