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

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

Set the bits so the 8-bit register holds 0x90. What is the pattern's value N in decimal?

0x90
N =
3.Medium
place values in two's complement1−12816413211608140201

The 8-bit pattern 1111 0100 stores a signed integer in two's complement. What is its value N in decimal?

1111 01008 bit
N =
4.Medium
place values in two's complement1−12806403201618040201

The 8-bit pattern 1000 1000 stores a signed integer in two's complement. What is its value N in decimal?

1000 10008 bit
N =
5.Hard
click the bits to set them012806403201608040201

Set the bits to the 8-bit result of 1101 0001 << 3. What is the result's value R in decimal?

1101 0001<< 3
R =
6.Hard
32 bit1 px640 px480 pxM = ? KiB

An uncompressed image is 640 × 480 pixels with 32 bits per pixel. How much memory M does it take, in KiB (1 KiB = 1024 bytes)?

640 × 480 px32 bit/px1 KiB = 1024 B
M = KiB

Answer key

  1. 1. N = 235
  2. 2. N = 144
  3. 3. N = −12
  4. 4. N = −120
  5. 5. R = 136
  6. 6. M = 1200 KiB

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