The look-ahead-carry adder is slower than the ripple-carry adder because it requires additional logic circuits.

More Questions from Digital Arithmetic Operations and Circuits

• There are four possible combinations for subtracting two binary numbers.
• The 74LS382 ALU is a 24-pin arithmetic/logic unit.
• Overflow indicators in ALU circuits indicate when add or subtract operations produce results that are too large to fit into four bits.
• A binary sum is made up of only 1s and 0s.
• Full adders can add two numbers and need not have a carry input or a carry output.
• ALU circuits cannot be cascaded to perform functions on more than four bits.
• Constants must be included in a package.
• The carry-out of a binary adder is identified using the summation symbol, sigma.
• If [A] = 10 and [B] = 01, then [A] + [B] = [ ].
• Digital computers use an easier method to subtract binary numbers, called one's complement.

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