Number systems
Decimal and binary conversion worksheets
Convert between decimal and binary with 16 questions, four number ranges and a separate answer key. Customize the worksheet and download a Letter or A4 PDF.
Preview and downloadNumber systems practice
Binary addition and subtraction worksheets
Print 16 binary arithmetic problems with addition, subtraction or a balanced mix. Choose four operand ranges and include a separate answer key.
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Start with a ready-made worksheet
Work vertically in base two. Carry when a column totals two, and borrow a group of two when needed. The selected range applies to operands.
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Customize this worksheetPaper sizes and printing help · More number systems activities
The range describes the operands
Choose addition only, subtraction only or a mixed sheet with eight of each. Addition results can exceed the selected range. Subtraction uses a larger first operand and a strictly positive difference.
The preview and downloaded PDF use the same questions. Include answers to append a separate key, or download just the student worksheet.
Learning objective
What this activity builds
Add and subtract in base two while keeping each digit in its correct place.
Worked example
Add 1011 and 1001 in base 2.
10100 in base 2.
The operands represent 11 and 9. Their sum is 20, which is 16 + 4 in binary. The answer needs an extra place.
Teaching notes
Make the practice count
- Align rightmost digits before calculating.
- Remember that 1 + 1 is written 10 in binary.
- Use decimal conversion as a check, then explain the binary working.
- Practice one operation before choosing the mixed worksheet.
Make it yours
Customize the practice
Choose your options, update the preview, then download the exact same pages.
Choose a range and operation profile. Every worksheet contains 16 reproducible tasks with a separate answer view.
Enlarged pages scroll. PDF size stays the same.
A useful next step
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