This adder is made from 5 of the little adders in the last page. It can add a pair of numbers each between 0 and 31 and produce a result between 0 and 62
To see the entire circuit, close the left panel by clicking on the little "<" near the top of the divider.
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It should be easy to see how we could add more adders to build a circuit that would add 6, 7, 8 or more bit numbers together. Most computers today can add 32 bit numbers in a single operation; they have 32 bit adders. A 32 bit number can have a value between 0 and 4,294,967,296 (about 4 billion).
See also:
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