If you’re like most people, you use a calculator to do math. But if you’re like me, sometimes you want to backspace on the calculator to make a mistake. Here’s how to do it on an iPhone:

  1. Open the Calculator app and type in 3 numbers (the ones in the top row of the app).
  2. Tap on the backspace key and then type in 1 (or any other number). The app will backspace one number and then add the next number in the row. So if you type in 3, it will backspace 3 times and then add 1. If you tap on the space bar, it will stop backspacing and just show your original numbers.