How to Subtract By Adding

The video tutorial explains a method of subtraction by adding, using historical events as examples. It describes how to transform subtraction into addition by manipulating digits, and provides several examples to illustrate the technique. The tutorial also discusses the application of this method in machines and computing, highlighting concepts like overflow and modular arithmetic. Finally, it explains how computers use two's complement for subtraction in binary.

What is the significance of the number -3 in the context of the adding machine?

Describe how computers subtract using the method mentioned in the text.