Here we will show you step-by-step how to calculate 91 plus 90 (91 + 90) using the Long Addition Method. We start by setting up our math problem as follows:
| 9 | 1 | |||||||
| + | 9 | 0 | ||||||
The next step is to add the ones digits together (1 + 0 = 1) like this:
| 9 | 1 | |||||||
| + | 9 | 0 | ||||||
| 1 |
Then in our final step, we add the tens digits together (9 + 9 = 18) like this:
| 9 | 1 | |||||||
| + | 9 | 0 | ||||||
| 1 | 8 | 1 |
And that is how you solve 91 plus 90 using the Long Addition Method! The answer is displayed mathematically below:
91 + 90 = 181
Long Addition Calculator
Here you can enter another addition problem for us to explain and solve using the Long Addition Method: