Learners might enjoy investigating which Roman numerals read the same backwards as forwards. ![]() What would you say are the differences between Roman numerals and the ways we write numbers now? Roman numerals have been mostly replaced by Arabic numbers (1, 2, 3). The system dates back about 2,000 years, to the time of ancient Rome. The group can then work on the task of finding numbers which use fewer numerals in the Roman numeral system than the Arabic system. Roman numerals are a system for representing numbers with letters of the Latin, or Roman, alphabet. You could then invite pairs to create the Roman numerals for the numbers written in Arabic numerals in the problem, which will help them familiarise themselves with the rules. You could begin by inviting learners to share anything they know already about Roman numerals.Ĭhallenge learners to decipher the Roman numerals given (perhaps in pairs) and use these examples to draw out the three rules. Comparing the number of numerals used in the two different systems makes an interesting context in which to practise interpreting and creating Roman numerals. This activity introduces children to Roman numerals. However, this will not always be the case.Ĭan you find some examples when the number of Roman numerals is fewer than the number of Arabic numerals for the same number? Why do this problem? '1984' written in Roman numerals has more numerals than when it is written in Arabic numerals. Now try converting the following into Roman numerals:Ĭan you work out how to write '1984' in Roman numerals? Try converting the following Roman numerals into Arabic numerals: Do not use the same symbol more than three times in a row.Ĭan you use these rules to construct and decipher Roman numerals? If a smaller numeral comes before a larger numeral, subtract the smaller number from the larger number ģ. If a smaller numeral comes after a larger numeral, add the smaller number to the larger number Ģ. ![]() ![]() Roman numerals have a set of rules which allow you to write down any number:ġ. In this way, any number can be written down, using only ten digits. For example, 2 on its own means 'two', but in 3240, the '2' now means "two hundred". In our number system (the Arabic numeral system), there are ten different digits, (0, 1, 2, 3, 4, 5, 6, 7, 8, 9) and the place of these digits in the number determines its value.
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