### Discussion :: Digital Arithmetic Operations and Circuits - General Questions (Q.No.3)

Pavani said: (Aug 10, 2011) | |

Take given data in the form of a, b then BCD subtraction= a+(9'scomplement of b) we get ans >9 then add 6 to the ans after msb is 1 that carry is added to the ans Given a=01001,b=00011 a+b=0110+1001=1111>9 1111+0110=1101 0101+1=00110 |

Bala said: (Jun 16, 2015) | |

Given: 1) 011001. 00011-->2's complement =11101. Add with 011001 we will get 00110. 2) 01100. 00111--->2's complement =11001. Add with 01100 we will get 00101. So answer is B 00110 00101. |

Shiv Babu Kushwaha said: (Sep 25, 2015) | |

When we are subtracting any binary no using 2's compliment attention on it. Take binary no, which we want to subtract. Ex. A-B = (110011)-(011011). Take B = 011011. Find out 2's compliment of B. First find 1's compliment as convert it as '1' becomes 0 and '0' becomes 1. 1's compliment is B = 100100. Add 1 on LSB with 1's compliment. 2's compliment is B' = 100100. +1. B' = 100101. Then A+B' = 110011+100101. = 011000 this is our answer. |

Kiran V said: (Aug 20, 2020) | |

Given: 01001 ->01001 -> 01001. 00011-> 1's Complement 11100. And 2's Complement -> 11101. Add Both the Numbers i.e 100110. Ignore the MSB then we will get -> 00110. Similarly, 01100 ->01100-> 01100. 00111 -> 1's Complement 11000 And 2's Complement ->11001 Add Both the Numbers i.e 100101. And finally, we get -> 00101. |

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