You will need
- Any grammar reference in the Russian language, for example: Kamynin A. A. Modern Russian language. The morphology (link to the Internet, see below).
Always start to write words a monetary amount or a number of any items in the official document with a capital letter. This is a very fundamental thing, because a document with an error in the design may not accept, for example, in the Bank.
Remember that numbers (i.e., verbal equivalents of numbers), indicating 300 and 400 end in a hundred. Remember that numbers that are multiples one hundred (500 to 900) are always in front part of a hundred compound words the soft sign (-ü-): the fifth-b-SOT, the pole b-SOT, etc.
If you want to decline, i.e. to change the case, then you should know that numbers that are multiples of a hundred, 500 to 900, are inclined, as the word "five hundred" (what? – five hundred; what? – five hundred; (of whom?) what? – five hundred; what? – five hundred; what? – about five hundred).
The General rule of declension of compound numerals lies in the fact that it (multiple cisleithania) must bow every component. For example: 500 649 words in the instrumental case (answers the question "whom?" "what?") will – restucture five hundred thousand forty-nine...
If you need to transfer a large number of different numbers in verbal form, then use some program like "Amount in words - an Outpost of 4.32". But this, of course, is only possible if you have a computer at hand.
Makes sense when there are difficulties arising in the process of writing numbers in words practice, for example, according to the textbook Ushakova O. D. "Morphological parsing of the word" (link in the Internet http://www.alleng.ru/d/rusl/rusl82.htm).