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 Numerals and ordinals
Updated 30 October 2002, 13.51

Overview
Many movies and TV shows have sequels and often they are given a Roman numeral to show the order in which they were made.

Students learn about Roman numerals and ordinals.

Learning aims

• Learn about ordinals and Roman numerals in texts.

• Change numbers into numerals and ordinals.
Introduction
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Roman numerals use letters in place of numbers:

1 = I 2 = II 3 = III 4 = IV 5 = V 6 = VI 7 = VII 8 = VIII 9 = IX 10 = X 20 = XX 30 = XXX 40 = XL 50 = L 60 = LX 70 = LXX 80 = LXXX 90 = XC 100 = C 500 = D 1000 = M

A number placed before a larger one can have the effect of minus.

So IV is four, five minus one, athough it is also often written as IIII.

Main activity
Display the following numerals and have students convert them into numbers.

CCXXVI = 226
XXXIV = 34
LXXIII = 73
CI = 101
VIII = 8
LVII = 57
MXII = 1012
XCII = 92
XV = 15
DXLIX = 549

When completed students should put these numerals in order from smallest to largest.

Explain that an ordinal names a position in a sequence eg: first, second, third etc.

Students write by their correct order the ordinal words for each position.

Plenary
Recap on the main teaching points and types of ordinals and numerals.

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