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4. (a) Convert the following Hex numbers to binary and add them. Express your final answer in HEX 2A7E + 45CB (b) Write down the 2's complement of the following binary number 10110000 (c) Convert the following numbers to binary and evaluate using the 2's complement method. Leave your answer in binary form. 68 - 145 (d) Write down the BCD form of decimal 936. 5. Describe two advantages of a PLC based system over a purely relay based one.
Hex
4. (a) Convert the following Hex numbers to binary and add them. Express your final answer in HEX 2A7E + 45CB (b) Write down the 2's complement of the following binary number 10110000 (c) Convert the following numbers to binary and evaluate using the 2's complement method. Leave your answer in binary form. 68 - 145 (d) Write down the BCD form of decimal 936. 5. Describe two advantages of a PLC based system over a purely relay based one.
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