Number systems worksheet with answers

Free printable Number systems worksheet: 6 problems from easy to exam level, with an answer key. Print it or save it as a PDF.

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Name: ____________________   Date: ____________

1.Easy
click the bits to set them012806403201608040201

Set the bits so the 8-bit register holds 0x66. What is the pattern's value N in decimal?

0x66
N =
2.Easy
click the bits to set them012806403201608040201

Set the bits so the 8-bit register holds 0x60. What is the pattern's value N in decimal?

0x60
N =
3.Medium
8-bit two's complement0−12806403201608040201

Set the bits so they store −37 in 8-bit two's complement. Read as an unsigned number, what is the pattern's value U?

N = −378 bit
U =
4.Medium
8-bit two's complement0−12806403201608040201

Set the bits so they store −27 in 8-bit two's complement. Read as an unsigned number, what is the pattern's value U?

N = −278 bit
U =
5.Hard
click the bits to set them012806403201608040201

Set the bits to the 8-bit result of 1110 1010 << 2. What is the result's value R in decimal?

1110 1010<< 2
R =
6.Hard
click the bits to set them012806403201608040201

Set the bits to the 8-bit result of 0111 0111 AND 1010 0111. What is the result's value R in decimal?

0111 0111AND1010 0111
R =

Answer key

  1. 1. N = 102
  2. 2. N = 96
  3. 3. U = 219
  4. 4. U = 229
  5. 5. R = 168
  6. 6. R = 39

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