英語/学習/数

#	基数	序数	序数（接尾辞）	倍または重ね	N個一組、優先度または重要度
1	one	first	1st	single	unitary (優先度) primary
2	two	second	2nd	double	binary (優先度) secondary
3	three	third	3rd	triple	ternary (優先度) tertiary
4	four	fourth	4th	quadruple	quaternary
5	five	fifth	5th	quintuple	quinary
6	six	sixth	6th	sextuple	senary
7	seven	seventh	7th	septuple	septenary
8	eight	eighth	8th	octuple	octonary
9	nine	ninth	9th	nonuple	novenary
10	ten	tenth	10th	decuple	denary
11	eleven	eleventh	11th	undecuple	undenary
12	twelve	twelfth	12th	duodecuple	duodenary
13	thirteen	thirteenth	13th	tridecuple	tridenary
14	fourteen	fourteenth	14th	quatuordecuple	quatuordenary
15	fifteen	fifteenth	15th	quindecuple	quindenary
16	sixteen	sixteenth	16th	sedecuple	sedenary
17	seventeen	seventeenth	17th	septendecuple	septendenary
18	eighteen	eighteenth	18th	octodecuple	octodenary
19	nineteen	nineteenth	19th	novemdecuple	novemdenary
20	twenty	twentieth	20th	vigintuple	vicenary
21	twenty-one	twenty-first	21st
22	twenty-two	twenty-second	22nd
23	twenty-three	twenty-third	23rd
24	twenty-four	twenty-fourth	24th
25	twenty-five	twenty-fifth	25th
26	twenty-six	twenty-sixth	26th
27	twenty-seven	twenty-seventh	27th
28	twenty-eight	twenty-eighth	28th
29	twenty-nine	twenty-ninth	29th
30	thirty	thirtieth	30th	trigintuple	tricenary
31	thirty-one	thirty-first	31st
40	forty	fortieth	40th
50	fifty	fiftieth	50th
60	sixty	sixtieth	60th	sexagintuple	sexagenary
70	seventy	seventieth	70th
80	eighty	eightieth	80th
90	ninety	ninetieth	90th
100	one hundred	one hundredth	100th
101	one hundred one	one hundred first	101st
144	one hundred forty-four	one hundred forty-fourth	144th
200	two hundred	two hundredth	200th
1000	one thousand	one thousandth	1000th
1945	nineteen forty-five	nineteen forty-fifth	1945th