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Grade 12 Binary Numbers Worksheet with Answers

Grade 12 (US) · Year 13 (UK) · Class 12 (India) · Computer Science

Unit 3: Systems & DataData Representation

Converting between binary and decimal with place values 1, 2, 4, 8 … and adding binary numbers. This free high school worksheet has 12 questions and a full answer key. Print it or save it as a PDF — every answer is checked by code, not guessed.

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Binary Numbers

Grade 12 · Computer Science

Score___ / 12

Name

Class

Date

Learning goal: Data Representation

Directions: Read each question carefully and write your answer on the line. Use the diagram to help you.

RememberBinary place values

1286432168421Each place is worth double the one to its right. Add the places that hold a 1.Example: 0 0 0 0 1 0 1 1 → 8 + 2 + 1 = 11
  1. 1

    What is the binary number 100000 in decimal?

    128064032116080402010
  2. 2

    What is the binary number 10100010 in decimal?

    128164032116080402110
  3. 3

    Write the decimal number 129 in binary.

    1286432168421
  4. 4

    Write the decimal number 26 in binary.

    1286432168421
  5. 5

    What is the binary number 1111011 in decimal?

    128064132116181402111
  6. 6

    Write the decimal number 241 in binary.

    1286432168421
  7. 7

    What is the binary number 11001100 in decimal?

    128164132016081412010
  8. 8

    Write the decimal number 53 in binary.

    1286432168421
  9. 9

    Write the decimal number 223 in binary.

    1286432168421
  10. 10

    What is the binary number 111001 in decimal?

    128064032116181402011
  11. 11

    What is the binary number 1111100 in decimal?

    128064132116181412010
  12. 12

    What is the binary number 1000011 in decimal?

    128064132016080402111

★ Challenge corner for fast finishers

9 computers each connect directly to every other computer with one cable. How many cables are needed?

How did I do?

Teacher's comments

Free printable worksheets with answer keys · aethelsystems.com/worksheets/computer/12/binary_numbers

Answer key (click to show)
  1. 1.32
  2. 2.162
  3. 3.10000001
  4. 4.11010
  5. 5.123
  6. 6.11110001
  7. 7.204
  8. 8.110101
  9. 9.11011111
  10. 10.57
  11. 11.124
  12. 12.67
  13. ★36 (challenge corner)

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