- 1). Spell out numbers written in one or two words, but use numerals for all other numbers. For example, "one," "thirty-six" and "fifteen hundred" can all be expressed in words, but "1,256" and "101" should use numerals.
- 2). Use numerals for all numbers that precede technical units of measurement---6 ounces, 101 millimeters, 15 pounds. Numerals should always be used with abbreviations or symbols (3%, 4:25 p.m., $5), in addresses (405 Maple St.) and in dates (April 5, 2008).
- 3). Use a combination of numerals and words for very large numbers, e.g. 45 million or 6 billion. Express related numbers in the same style ("only 5 of the 240 people," "we have 3 cars and 250 trucks for sale").
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