Roman Numerals

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Roman Numerals

• One to ten

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How do you write the number
one?
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1
4
How do you write the Roman numeral one?
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I

• Does Roman numeral one look like a letter you
  know?

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How do you write the Roman numerals two and
three?
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What?How?
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• One Two Three
• 1 2 3
• How do you write Roman numerals?

I II III
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What about four?Its different.
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• FOUR

IV
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What about five?

• V

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• Lets draw a Roman numeral number line from one
  to five!

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• ____________________________
• I II III IV V

1 2 3 4
5
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Do you see a pattern?
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• If a larger number follows a smaller one,
  subtract the first number from the second number.
• IV means V I (or 5 1 4)

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• Lets write Roman numerals six, seven, and eight.

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VI
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• Seven 7
• VII

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• Lets try eight.
• Eight 8

VIII
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Do you see another pattern?
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• If a number is followed by one or more symbols,
  add them together.
• VIII means V I I I or
• ( 5 1 1 1 8)

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What about nine? Is nine different also?
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• Nine 9
• IX

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What about ten?

• How do you write the Roman numeral ten?

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• X

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Answer these questions.

• In Roman numerals write
• Your age last year.
• Your age this year.
• Your age next year.