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Lesson 7: |
0 | zero |
1 | un |
2 | du |
3 | tri |
4 | quar |
5 | kin |
6 | sis |
7 | sep |
8 | ok |
9 | non |
10 | dek |
100 | cent |
1 000 | mil |
1 000 000 | milion |
1 000 000 000 000 | bilion |
In forming compound numbers, Ido makes use of the adjectival -a to indicate multiplication and the conjunction e to indicate addition.
Milenonacenteduadeketri
One thousand nine-hundred twenty-three
Ordinals are formed from the cardinals by adding the suffix -esm then the ending -a. Ordinals and cardinals may be used as nouns or adverbs by changing the ending to -o or -e, respectively.
Dekeduesma, 12-ma. Trio.
Twelveth, 12th. A trio.
Fractions are by the suffix -im.
Duimo, du triimi
A half, two thirds
Multiples or formed with the suffix -opl.
Duopla, centopla
Double, hundredfold
Distributives are formed with the suffix -op.
Quarope
In fours
The word foye means "times" in counting; it can be suffixed to the end of a cardinal.
Unfoye, dufoye, trifoye, quarfoye, ...
Once, twice, thrice, four times, ...
As prefixes, the numbers 1 through 9 have special forms: mono-, bi-, tri-, quadri-, quinqua-, sexa-, septa-, okto-, nona-.
Monokolorala, quadrapedo
Monochrome, quadraped
Note the following arithmetic words:
Plus, minus, per, sur, facas
Plus, minus, times, divided by, equals