Leson defsis (16) / Defsisi leson

CARDINAL NUMBERS are invariable:

1,  unu,  2  du,  3  ce (combining form:  cev-),  4  par, 5 pin,  6  sis,  7 sep,  8 of,  9  nef,  10 dec                         

The numerals between 12 and 17 and also 19  have modifications to the "10" component:  11  decunu,   12 devdu, 13 defce,  14  dexpar,  15 dexpin,  16 desis,   17 desep,  18  decof,  19 denef.

The numerals 40, 50, etc, again, have modifications for the tens place number:    dudec, cedec, padec, pidec, sidec, sedec, odec, nedec.  

The numerals 400 -  900 have the same modification in the hundreds place as 40 - 90 have in the 10s place:  200  dusat,  300  cesat,    400  pasat,    500   pisat,   600  sisat,   700  sesat,   800  osat,   900  nesat

1000  mil

Numerals between the multiples (below 999) are created by simple juxtaposition of the elements:  56   pidec sis,   437  pasat cedec sep,  7261  sep mil dusat sidec unu.  As can be seen by this past example, "mil" is usually written separately from the number that modifies it, even though, according to the rules, it should be attached to the numeral preceding it.

"million" is "bin"

And finally, "-ole" meaning "multiplied by"causes no modifications since it starts with -o-:  duole par esar of.   2 x 4 is 8.

Kutom de jelo?  How many years?
Kutom esar cevole par?  How much are 3 times 4?

Kutomi esar sa cas?  What time is it?  (Which"th" is the hour?)
Esar sa pari cas.     It's four o'clock ((it) is the fourth hour).
Esar sa pari cas kaj despin.  It's 4:15.


1.  Kutom da ifano imar sa jodaj?   Li imar par infanien.
2.  Kutom da ifano idar a nui kenun?  Sat cedec unu idar a nui kenun.
3.  Kutom da ifaniko kenar sa kenaj?  Li kenar pidec ce ifanien.
4.  Ci esar ma file ifanino?  Anu, ni imar sedec of ifaninien en sa kenun.
5.  Kutom da ifanino esar en xuti kenunel?  Esar padec en unu kenunel kaj cedec of en sa ali.
6.  Kutom esar despin kaj cedec du?  Ki esar padec sep.
7.  Kutom esar sepole dudec?  Ki esar sat padec.
8.  Kutom esar devduole nef?  Ki esar sat of.
9.  Kutom esar sepole pidec ce? Ki esar pin mil cesat.
10. Kutom de kenajien imar tui tadik?  Li imar ce kenajinien, du dinajinien kaj unu kipaj, kuto esar sis dinajien.
11.  Kutom de jado vi vidar?  Mi nu vidar filisen; mi axar, ke mi vidar dudec jadien.
12.  Kutom de coveko esor xe vi ojdene?  Ni imor ojdene xe ni cedec herinien kaj dudec of herikien.