Here we will show you step-by-step how to calculate 18 plus 15 (18 + 15) using the Long Addition Method. We start by setting up our math problem as follows:
| 1 | 8 | |||||||
| + | 1 | 5 | ||||||
The next step is to add the ones digits together (8 + 5 = 13). Since the sum creates 1 tens digit, we put the 1 in the tens column, and the 3 at the bottom of the ones:
| 1 | ||||||||
| 1 | 8 | |||||||
| + | 1 | 5 | ||||||
| 3 |
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 | 5 | ||||||
| 3 | 3 |
And that is how you solve 18 plus 15 using the Long Addition Method! The answer is displayed mathematically below:
18 + 15 = 33
Long Addition Calculator
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