If you want to add two numbers together on an iPhone, there are a few different ways to do it. One way is to use the keyboard, and the other is to use the touchscreen. To add two numbers using the keyboard, first open the keyboard by pressing and holding down on the “i” button and then selecting “Keyboard.” Next, type in your numbers and press enter. To add two numbers using the touchscreen, first tap on one of the numbers and then drag it over to the other number. Once they’re both over there, release your finger and they’ll be added together. ..