TABLE OF NUMBERS | ||||||
---|---|---|---|---|---|---|
CARDINAL NUMBERS^{1} | ORDINAL NUMBERS^{4} | |||||
NAME^{2} | SYMBOL | NAME^{5} | SYMBOL^{6} | |||
Hindu-Arabic | Roman^{3} | |||||
zero or naught or cipher | 0 | |||||
one | 1 | I | first | 1st | ||
two | 2 | II | second | 2d | or 2nd | |
three | 3 | III | third | 3d | or 3rd | |
four | 4 | IV | fourth | 4th | ||
five | 5 | V | fifth | 5th | ||
six | 6 | VI | sixth | 6th | ||
seven | 7 | VII | seventh | 7th | ||
eight | 8 | VIII | eighth | 8th | ||
nine | 9 | IX | ninth | 9th | ||
ten | 10 | X | tenth | 10th | ||
eleven | 11 | XI | eleventh | 11th | ||
twelve | 12 | XII | twelfth | 12th | ||
thirteen | 13 | XIII | thirteenth | 13th | ||
fourteen | 14 | XIV | fourteenth | 14th | ||
fifteen | 15 | XV | fifteenth | 15th | ||
sixteen | 16 | XVI | sixteenth | 16th | ||
seventeen | 17 | XVII | seventeenth | 17th | ||
eighteen | 18 | XVIII | eighteenth | 18th | ||
nineteen | 19 | XIX | nineteenth | 19th | ||
twenty | 20 | XX | twentieth | 20th | ||
twenty-one | 21 | XXI | twenty-first | 21st | ||
twenty-two | 22 | XXII | twenty-second | 22d | or 22nd | |
twenty-three | 23 | XXIII | twenty-third | 23d | or 23rd | |
twenty-four | 24 | XXIV | twenty-fourth | 24th | ||
twenty-five | 25 | XXV | twenty-fifth | 25th | ||
twenty-six | 26 | XXVI | twenty-sixth | 26th | ||
twenty-seven | 27 | XXVII | twenty-seventh | 27th | ||
twenty-eight | 28 | XXVIII | twenty-eighth | 28th | ||
twenty-nine | 29 | XXIX | twenty-ninth | 29th | ||
thirty | 30 | XXX | thirtieth | 30th | ||
thirty-one | 31 | XXXI | thirty-first | 31st | ||
thirty-two etc | 32 | XXXII | thirty-second | 32d | or 32nd | |
forty | 40 | XL | fortieth | 40th | ||
forty-one, etc. | 41 | XLI | forty-first | 41st | ||
forty-two etc | 42 | XLII | forty-second | 42d | or 42nd | |
fifty | 50 | L | fiftieth | 50th | ||
sixty | 60 | LX | sixtieth | 60th | ||
seventy | 70 | LXX | seventieth | 70th | ||
eighty | 80 | LXXX | eightieth | 80th | ||
ninety | 90 | XC | ninetieth | 90th | ||
one hundred | 100 | C | hundredth or one hundredth | 100th | ||
one hundred and one or one hundred one |
101 | CI | hundred and first or one hundred and first |
101st | ||
one hundred and two etc | 102 | CII | one hundred and second etc | 102d | or 102nd | |
two hundred | 200 | CC | two hundredth | 200th | ||
three hundred | 300 | CCC | three hundredth | 300th | ||
four hundred | 400 | CD | four hundredth | 400th | ||
five hundred | 500 | D | five hundredth | 500th | ||
six hundred | 600 | DC | six hundredth | 600th | ||
seven hundred | 700 | DCC | seven hundredth | 700th | ||
eight hundred | 800 | DCCC | eight hundredth | 800th | ||
nine hundred | 900 | CM | nine hundredth | 900th | ||
one thousand or ten hundred etc | 1,000 | M | thousandth or one thousandth | 1,000th | ||
two thousand etc | 2,000 | MM | two thousandth etc | 2,000th | ||
five thousand | 5,000 | five thousandth | 5,000th | |||
ten thousand | 10,000 | ten thousandth | 10,000th | |||
one hundred thousand | 100,000 | hundred thousandth or one hundred thousandth |
100,000th | |||
one million | 1,000,000 | millionth or one millionth | 1,000,000th | |||
^{1}The cardinal numbers are used in simple counting or in answer to "how
many?" The words for these numbers may be used as nouns (he counted to twelve),
as pronouns (twelve were found), or as adjectives (twelve boys).
^{2}In formal contexts the numbers one to one hundred and in less formal contexts
the numbers one to nine are commonly written out, while larger numbers are given in
numerals. In nearly all contexts a number occurring at the beginning of a sentence is
usually written out. Except in very formal contexts numerals are invariably used for
dates. Hindu-Arabic numbers from 1,000 to 9,999 are often written without commas or spaces
(1000, 9999). Year numbers are always written without commas (1783).
^{3}The Roman numerals are written either in capitals or in lowercase letters.
^{4}The ordinal numbers are used to show the order of succession in which such
items as names, objects, and periods of time are considered (the twelfth month; the
fourth row of seats; the 18th century).
^{5}Each of the terms for the ordinal numbers excepting first and second is used
in designating one of a number of parts into which a whole may be divided (a fourth;
a sixth; a tenth) and as the denominator in fractions designating the number
of such parts constituting a certain portion of a whole one fourth; three fifths).
When used as nouns the fractions are usually written as two words, although they are
regularly hyphenated as adjectives (a two-thirds majority). When fractions are
written in numerals, the cardinal symbols are used (1/4, 3/5, 5/6).
^{6}The Hindu-Arabic symbols for the cardinal numbers may be read as ordinals in
certain contexts (January 1 = January first; 2 Samuel = Second Samuel). The Roman numerals
are sometimes read as ordinals (Henry IV = Henry the Fourth); sometimes they are written
with the ordinal suffixes (XIXth Dynasty).
DENOMINATIONS ABOVE ONE MILLION | |||||||
---|---|---|---|---|---|---|---|
American System^{1} | British System^{1} | ||||||
NAME | VALUE IN POWERS OF TEN |
NUMBER OF ZEROS^{2} |
NUMBER OF GROUPS OF THREE 0'S AFTER 1,000 |
NAME | VALUE IN POWERS OF TEN |
NUMBER OF ZEROS^{2} |
POWERS OF 1,000,000 |
billion | 10^{9} | 9 | 2 | milliard | 10^{9} | 9 | -- |
trillion | 10^{12} | 12 | 3 | billion | 10^{12} | 12 | 2 |
quadrillion | 10^{15} | 15 | 4 | trillion | 10^{18} | 18 | 3 |
quintillion | 10^{18} | 18 | 5 | quadrillion | 10^{24} | 24 | 4 |
sextillion | 10^{21} | 21 | 6 | quintillion | 10^{30} | 30 | 5 |
septillion | 10^{24} | 24 | 7 | sextillion | 10^{36} | 36 | 6 |
octillion | 10^{27} | 27 | 8 | septillion | 10^{42} | 42 | 7 |
nonillion | 10^{30} | 30 | 9 | octillion | 10^{48} | 48 | 8 |
decillion | 10^{33} | 33 | 10 | nonillion | 10^{54} | 54 | 9 |
undecillion | 10^{36} | 36 | 11 | decillion | 10^{60} | 60 | 10 |
duodecillion | 10^{39} | 39 | 12 | undecillion | 10^{66} | 66 | 11 |
tredecillion | 10^{42} | 42 | 13 | duodecillion | 10^{72} | 72 | 12 |
quattuordecillion | 10^{45} | 45 | 14 | tredecillion | 10^{78} | 78 | 13 |
quindecillion | 10^{48} | 48 | 15 | quattuordecillion | 10^{84} | 84 | 14 |
sexdecillion | 10^{51} | 51 | 16 | quindecillion | 10^{90} | 90 | 15 |
septendecillion | 10^{54} | 54 | 17 | sexdecillion | 10^{96} | 96 | 16 |
octodecillion | 10^{57} | 57 | 18 | septendecillion | 10^{102} | 102 | 17 |
novemdecillion | 10^{60} | 60 | 19 | octodecillion | 10^{108} | 108 | 18 |
vigintillion | 10^{63} | 63 | 20 | novemdecillion | 10^{114} | 114 | 19 |
centillion | 10^{303} | 303 | 100 | vigintillion | 10^{120} | 120 | 20 |
centillion | 10^{600} | 600 | 100 |
^{1}The American system of numeration for denominations above one million was
modeled on the French system but more recently the French system has been changed to
correspond to the German and British systems. In the American system each of the
denominations above 1,000 millions (the American billion) is 1,000 times the preceding one
(one trillion = 1,000 billions; one quadrillion = 1,000 trillions). In the British system
the first denomination above 1,000 millions (the British milliard) is 1,000 times the
preceding one, but each of the denominations above 1,000 milliards (the British billion)
is 1,000,000 times the preceding one (one trillion = 1,000,000 billions; one quadrillion =
1,000,000 trillions).
^{2}For convenience in reading large numerals, the thousands, millions, etc., are
usually separated by commas (21,530; 1,155,465) or especially in technical contexts by
spaces (1 155 465). Serial numbers (as social security numbers are usually written with
hyphens (042-24-4705).