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 0x94. What is the pattern's value N in decimal?

0x94
N =
2.Easy
click the bits to set them012806403201608040201

Set the bits so the 8-bit register holds 0x79. What is the pattern's value N in decimal?

0x79
N =
3.Medium
8-bit two's complement0−12806403201608040201

Set the bits so they store −32 in 8-bit two's complement. Read as an unsigned number, what is the pattern's value U?

N = −328 bit
U =
4.Medium
8-bit two's complement0−12806403201608040201

Set the bits so they store −11 in 8-bit two's complement. Read as an unsigned number, what is the pattern's value U?

N = −118 bit
U =
5.Hard
click the bits to set them012806403201608040201

Set the bits to the 8-bit result of 1110 0101 << 2. What is the result's value R in decimal?

1110 0101<< 2
R =
6.Hard
click the bits to set them012806403201608040201

Set the bits to the 8-bit result of 1110 1111 AND 0101 0100. What is the result's value R in decimal?

1110 1111AND0101 0100
R =

Answer key

  1. 1. N = 148
  2. 2. N = 121
  3. 3. U = 224
  4. 4. U = 245
  5. 5. R = 148
  6. 6. R = 68

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