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Grade 8 Binary Numbers Worksheet with Answers

Grade 8 (US) · Year 9 (UK) · Class 8 (India) · Computer Science

Unit 1: Representing DataBinaryCSTA 2-DA-07

Converting between binary and decimal with place values 1, 2, 4, 8 … and adding binary numbers. This free middle 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 8 · Computer Science

Score___ / 12

Name

Class

Date

Learning goal: Binary · CSTA 2-DA-07

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 10001110 in decimal?

    128164032016081412110
  2. 2

    What is the binary number 110000 in decimal?

    128064032116180402010
  3. 3

    What is the binary number 11110100 in decimal?

    128164132116180412010
  4. 4

    What is the binary number 11001001 in decimal?

    128164132016081402011
  5. 5

    What is the binary number 10011100 in decimal?

    128164032016181412010
  6. 6

    What is the binary number 1110 in decimal?

    128064032016081412110
  7. 7

    Write the decimal number 62 in binary.

    1286432168421
  8. 8

    What is the binary number 11001100 in decimal?

    128164132016081412010
  9. 9

    What is the binary number 11111101 in decimal?

    128164132116181412011
  10. 10

    What is the binary number 10010000 in decimal?

    128164032016180402010
  11. 11

    Write the decimal number 181 in binary.

    1286432168421
  12. 12

    Write the decimal number 189 in binary.

    1286432168421

★ Challenge corner for fast finishers

How many different patterns can 4 bits make?

8421

How did I do?

Teacher's comments

Free printable worksheets with answer keys · aethelsystems.com/worksheets/computer/8/binary_numbers

Answer key (click to show)
  1. 1.142
  2. 2.48
  3. 3.244
  4. 4.201
  5. 5.156
  6. 6.14
  7. 7.111110
  8. 8.204
  9. 9.253
  10. 10.144
  11. 11.10110101
  12. 12.10111101
  13. ★16 (challenge corner)

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