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The Georgian numerals are the system of number names used in Georgian, a language spoken in the country of Georgia. The Georgian numerals from 30 to 99 are constructed using a base-20 system,〔Aronson (1990), p. 279. "From 30 to 99 Georgian numerals are based on the vigesimal system, i.e., a system to base 20, unlike our decimal system to base 10."〕〔Hewitt (1995), p. 524. "The system from '11' to '19' is analysable as '10-UNIT-more'. From '20' to '99' the system is based on units of 20 (i.e. it is vigesimal, so that, for example, '55' is literally '2-times-20-and-(10-5-more)'."〕〔Makharoblidze (2009), p. 27. "() Georgian system of numbers is based on the counting system of 20. The numbers more than 20 and less than 100 are compound and the first number is (multiplied by the preceding numeral ("1" is not shown) ) and then () remaining number is added."〕 similar to the scheme used in Basque, French for numbers 80 through 99, or the notion of the ''score'' in English. The symbols for numbers in modern Georgian texts are the same Arabic numerals used in English, except that the comma is used as the decimal separator, and digits in large numbers are divided into groups of three using spaces or periods (full stops). An older method for writing numerals exists in which most of letters of the Georgian alphabet (including some obsolete letters) are each assigned a numeric value.〔Makharoblidze (2009), p. 7〕 == Cardinal numbers == The Georgian cardinal numerals up to ten are primitives, as are the words for 20 and 100, and also "million", "billion", etc. (The word for 1000, though, is not a primitive.) Other cardinal numbers are formed from these primitives via a mixture of decimal (base-10) and vigesimal (base-20) structural principles.〔Makharoblidze (2009), pp. 28–29.〕 The following chart shows the nominative forms of the primitive numbers. Except for ''rva'' (8) and ''tskhra'' (9), these words are all consonant-final stems and may lose the final ''i'' in certain situations. Numbers from 11 to 19 are formed from 1 through 9, respectively, by prefixing ''t'' (a shortened form of ''ati,'' 10) and adding ''met'i'' (= more). In some cases, the prefixed ''t'' coalesces with the initial consonant of the root word to form a single consonant (''t + s → ts; t + š → č; t + ts → ts''), or induces metathesis in the root (''t + rv → tvr'').〔Hewitt (1995), pp. 51–54.〕 Numbers between 20 and 99 use a vigesimal (base-20) system (comparable to 60–99 in French). 40, 60, and 80 are formed using 2, 3, and 4 (respectively), linked to the word for 20 by ''m'' (a vestigial multiplicative):〔〔 Any other number between 21 and 99 is formed using 20, 40, 60, or 80, dropping the final ''i,'' then adding ''da'' (= and) followed by the appropriate number from 1 to 19;〔〔 e.g.: The hundreds are formed by linking 2, 3, . . ., 10 directly to the word for 100 (without the multiplicative ''m'' used for 40, 60, and 80). 1000 is expressed as ''atasi'' (10 x 100), and multiples of 1000 are expressed using ''atasi'' — so, for example, 2000 is ''ori atasi'' (2 x 10 x 100).〔 The final ''i'' is dropped when a smaller number is added to a multiple of 100;〔 e.g.: 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Georgian numerals」の詳細全文を読む スポンサード リンク
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