Notation and numeration.
less is placed after the greater, the value of the greater is increased.
Thus IV denotes four, while VI denotes six.
3. A line over a letter increases its value a thousand times. Thus: V̅ denotes 5000; M̅ denotes one million.
Table of Roman notation.
I. One. XXX. Thirty. II. Two. XL. Forty. III. Three. L. Fifty. IV. Four. LX. Sixty: V. Five. LXX. Seventy. VI. Six. LXXX. Eighty. VII. Seven. XC. Ninety. VIII. Eight. C. One hundred. IX. Nine. CC. Two hundred. X. Ten. CCC. Three hundred. XI. Eleven. CCCC. Four hundred. XII. Twelve. D. Five hundred. XIII. Thirteen. DC. Six hundred. XIV. Fourteen. DCC. Seven hundred. XV. Fifteen. DCCC. Eight hundred. XVI. Sixteen. DCCCC. Nine hundred, XVII. Seventeen. M. One thousand. XVIII. Eighteen. MD. Fifteen hundred. XIX. Nineteen. MM. Two thousand. XX. Twenty. MDCCCLXX. 1870. XXI. Twenty-one.
§ 14. The preceding illustrations show the three methods of expressing numbers.
1st. By words, or ordinary language.
2d. By figures, called the Arabic method.
3d. By letters, called the Roman method.
