![]() Again the combinational circuit that performs addition of three bits (Two significant bits and a previos carry) is called Full adder. ![]() A combinational circuit that performs the addition of two bits is called a half adder. When the augend and addend number contain more significant digits, the carry obtained from from the addition of two bits is added to the next higher order pair of significant bits. The higher significant bit of this result is called a carry. The first three operations produce a sum whose length is one digit, but when both augund and addend bits are equal to 1, the binary sum consists of two digits. The moest basic arithmatic operation is the additon of two binary digits. ![]() Among the basic tasks encountered are the various arithmatic operartions. Digital computers perform a varity of information processing tasks. ![]()
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