Page%1%of%4%
Binary'Addition'
%
By%the%end%of%this%worksheet%you%should:%
%
• know%how%a%computer%adds%two%binary%
values%together%
• be%able%to%define%what%is%meant%by%a%carry%
%
%
Computers%can’t%do%much;%but%they%do%it%incredibly%
quickly.%
%
One%things%computers%can%do%is%add.%
%
Yet%computers%use%binary,%so%we%need%to%know%how%
computers%add%two%binary%numbers%together.%
%
%
%
BINARY:%% A%numbering%system%used%by%computers%and%
digital%circuits.%
Uses%2%values;%0%or%1.%
%
DENARY:% A%numbering%system%used%by%humans%around%
the%world.%
Uses%10%values:%0,%1,%2,%3,%4,%5,%6,%7,%8%or%9.%
%
%
%
Why?%Why%do%we%need%to%know%how%to%add%two%binary%
numbers%together?%
%
Well,%it’s%not%to%check%that%you%can%add%two%1s%together;%
we’re%sure%you%can%do%that.%
%
It’s%because%knowing%how%your%computer%works%is%key%to%
understanding%programming%and%how%computers%do%the%
things%they%do.%
%
Now,%it%is%important%to%remember%the%following:%
%
% 0%+%0%=%0%
% 0%+%1%=%1%
% 1%+%0%=%1%
% 1%+%1%=%2%
% 1%+%1%+%1%=%3%
