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Numbers written in different numeral systems. A numeral system is a writing system for expressing numbers; that is, a mathematical notation for representing numbers of a given set, using digits or other symbols in a consistent manner. The same sequence of symbols may represent different numbers in different numeral systems.
After "nine", one can head straight back into the 10, 11, 12, etc., although some write out the numbers until "twelve". Example: "I have 28 grapes." (Preferred) Example: "I have twenty-eight grapes." Another common usage is to write out any number that can be expressed as one or two words, and use figures otherwise. Examples:
The Ultimate List – An 824 word list and an extended 1455 word list of English words possible to display on an upside down calculator, HTML code to aid their creation plus three 'micro stories' using only the available words. 251 words you can spell with a calculator. – Present&Correct 251 words you can spell with a calculator. (10/27/13)
Microsoft Math contains features that are designed to assist in solving mathematics, science, and tech-related problems, as well as to educate the user. The application features such tools as a graphing calculator and a unit converter. It also includes a triangle solver and an equation solver that provides step-by-step solutions to each problem.
Numbers in mathematical formulae are never spelled out (3 < π < 22 / 7 not three < pi < twenty-two sevenths), and "numbers as numbers" are rarely spelled out in other mathematical contexts (the first three primes are 2, 3, and 5 not the first three primes are two, three, and five; but zero-sum game and roots of unity).
Here are three sample check amounts, with examples of how to write them out correctly: $1,750: One thousand, seven hundred fifty and 00/100 $47.99: Forty-seven and 99/100
The [Reuters Style Guide] states: When referring to times first give the local time by the 12-hour clock (without using the words local time) and follow it with a bracketed conversion to a 24-hour clock time for a specified time zone, e.g. ... will meet at 10 a.m. (1600 GMT). Use figures except for noon and midnight.
A mathematical symbol is a figure or a combination of figures that is used to represent a mathematical object, an action on mathematical objects, a relation between mathematical objects, or for structuring the other symbols that occur in a formula.