There are a few rules that one should follow when writing numbers. Unless there is a measurement, such as inches or ounces, numbers one through nine should be in written form. Numbers above nine can be written in either numerical form or alphabetical form, such as 22 and twenty-two. A good rule of thumb to remember is that if the number would take more than two words to write out, like 1,442, it is best to keep them in numerical form.
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Last updated: 12/15/2017
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