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
Roman numeral conversion worksheets
Convert between decimal and Roman numerals with nine ranges, 16 questions and printable answers. The highest range includes 4000 with an explained overline convention.
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Write eight decimal values as Roman numerals, then convert eight Roman numerals to decimal. On the highest range, an overline multiplies the numeral by 1000.
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State the notation before reading it
These worksheets use ordinary subtractive Roman numerals through 3999. The 1000–4000 range also includes IV with an overline for 4000. The highest-range sheet explains this multiplier; ordinary IV still means four.
IV = 4 × 1000 = 4000
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
Read and write canonical subtractive Roman numerals and interpret the stated overline convention.
Worked example
Write decimal 944 as a Roman numeral.
CMXLIV.
Split 944 into 900 + 40 + 4. The corresponding subtractive pairs are CM, XL and IV.
Teaching notes
Make the practice count
- Recognize IV, IX, XL, XC, CD and CM as pairs.
- Read a long numeral in hundreds, tens and ones groups.
- Do not treat Roman notation as a positional base system.
- For 4000, this worksheet uses IV with an overline: 4 × 1000.
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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.
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