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Binary place value

Use powers of two to convert 8-bit binary numbers to decimal and back again.

⏱ 20 min❓ 8 questions

What you'll be able to do

  • ✔I can write the place values of an 8-bit binary number
  • ✔I can convert an 8-bit binary number to decimal
  • ✔I can convert a decimal number from 0 to 255 into 8-bit binary

How this works

  1. 1Read the short explanations first — they teach you what you need before each question.
  2. 2Answer each question, then tap Check. A right answer moves you on automatically; if it's wrong, you'll see a friendly explanation of why.
  3. 3Finish all 3 steps to see your score — sign in and subscribe to unlock the full lesson and save it.

What's inside

8 questions and 1 quick teaching card, including:

  • ↕️Put in order — Use the up and down arrows to sort the steps.
  • 🔢Number answer — Work out the answer and type the number.

👪Grown-up tip: sit alongside younger learners for the first few lessons. Read the questions together and chat about the explanations — that's where the real learning sticks.

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Curriculum: AC9TDI8K04