These are the practice problems from page 73 & 74 mentioned in class.

1. Convert the following decimal numbers to excess four notation.
   (i.e. 3 bit word).

   a)  0
   b)  3
   c) -3
   d) -1
   e)  1

2. Convert the following two's complement patterns to decimal.

   a) 10000
   b) 10011
   c) 01101
   d) 01111
   e) 10111

3. Convert the following decimal numbers to 7 bit two's complement
   notation.

   a)  12
   b) -12
   c)  -1
   d)   0
   e)   8

4. Complete the following where the binary patterns are in two's 
   complement notation. Indicate where overflow occurs.

   a) 00101 + 01000
   b) 01111 + 00001
   c) 11111 + 00001
   d) 10111 + 11010
   e) 00111 + 00111
   f) 00111 + 01100
   g) 11111 + 11111
   h) 01010 + 10101
   i) 01000 + 01000
   j) 01010 + 00011

5. Complete the following. Use 5 bit two's complement notation. Indicate
   where overflow occurs.

   a)  7 + 1 
   b)  7 - 1 
   c) 12 - 4 
   d)  8 - 7 
   e) 12 + 4 
   f)  4 + 11