ADV 3001 Lecture 3: AP Style
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Spell out whole numbers below 10, use gures for 10 and above: three sons, 10 station wagons. Always numerical: age, percentages, temperatures, money (almost always, measurements. Don"t ever start a sentence with a number: if you do, spell out numerals, one exception to the rule is you can start a sentence with a year. Use roman numerals for wars, monarchs, and popes. For large numbers, use a hyphen to connect a word ending in y: twenty-one. Do not use commas between other separate words that are part of one number. Spell out casual expressions: a thousand times no.