1.

Add the two BCD numbers: 1001 + 0100 = ?(a) 10101111(b) 01010000(c) 00010011(d) 00101011The question was posed to me in final exam.My doubt stems from Binary Coded Decimal(BCD) in chapter Number System and Codes of Digital Circuits

Answer»

Correct CHOICE is (c) 00010011

The BEST I can explain: Firstly, ADD the 1001 and 0100. We GET 1101 as OUTPUT but it’s not in BCD form. So, we add 0110 (i.e. 6) with 1101. As a result we get 10011 and it’s BCD form is 0001 0011.



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