With decimal numbers there are "only" 10 possible values a single digit can be; 0 through 9, and to get numbers larger than 9 we just start adding more digits to the front.

Let's start by thinking about what it would take to add two one-digit binary numbers together. Try writing out the binary sums for all the possible combinations of 0 and 1.

Computers use binary to process data. There are simple techniques to convert between binary and denary and to add two binary numbers together. Representing text, images and sound Learn how text ...