Question

4. Multiply the following numbers: a. 101010 x 1101 (binary) b. 11011011 x 11010011 (binary) c. 426 x 135 (octal) d. B23D x 21 (hexadecimal)
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Answer #1
a.

    101010 X 1101

        101010
       000000X
      101010XX
     101010XXX
Ans=1000100010

b. 11011011 X 11010011

                 11011011
                11011011X
               00000000XX
              00000000XXX
             11011011XXXX
            00000000XXXXX
           11011011XXXXXX
          11011011XXXXXXX
Ans =    1011010010000001

c. 
426 x 135 (octal)
= 100010110 x 1011101
= 110010011111110 (on similar ways as above)
= 62376 (octal)

d.
B23D x 21 (Hex)
= 1011001000111101 x 100001
= 101101111100111011101
= 16F9DD (Hex)
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