Numerals

The cardinal numbers

nol — 0
un — 1
dwa — 2
tri — 3
char — 4
pet — 5
sit — 6
sem — 7
ot — 8
nin — 9
shi — 10

(the numerals from 11 to 19 are written with a hyphen; the accent is on the second syllable)

shi-un — 11
shi-dwa — 12
shi-tri — 13
shi-char — 14
shi-pet — 15
shi-sit — 16
shi-sem — 17
shi-ot — 18
shi-nin — 19

(20, 30...90 are written together, the accent on the first syllable)

dwashi — 20
dwashi-un — 21
dwashi-dwa — 22...
trishi — 30
charshi — 40
petshi — 50
sitshi — 60
semshi — 70
otshi — 80
ninshi — 90
sto — 100
sto-un — 101
sto-dwa — 102 ...
dwasto — 200
tristo — 300
charsto — 400
petsto — 500
sitsto — 600
semsto — 700
otsto — 800
ninsto — 900
mil — 1000
milion — million

25473 — dwashi-pet mil charsto-semshi-tri (mil, milion are written separately, the others with a hyphen)

The ordinal numerals

These are formed with the help of the particle “-ney”:

un-ney — first
dwa-ney — second
tri-ney — third
char-ney — forth...
shi-ney — tenth
shi-un-ney — eleventh...
sto-petshi-char-ney — one hundred fifty forth.

Replacing –ney with –nem gives adverbial forms:

un-nem — firstly; at first
dwa-nem — secondly
tri-nem — thirdly
char-nem — in the forth place...
shi-nem — in the tenth place
shi-un-nem — in the eleventh place...
sto-petshi-char-nem — in the one hundred fifty forth place.

Numeral suffixes

•   -ka — the suffix forming nouns from numerals. For example, "petka" may denote a bus number 5, or grade of "five" signifying "excellent", or a five-dollar note ("fiver"), etc. Such nouns are practical with rather small numbers, up to 100.

unka — one
dwaka — two, deuce
trika — three
charka — four
petka — five…
shika — ten
shi-dwaka — dozen
dwashika — twenty
trishika — thirty
stoka — a hundred

•   -fen —forms fractions:

un (de) dwafen — one half
un trifen — one third
charfen — a quarter
sem shifen — seven tenths
tri stofen — three hundredths
pet otfen — five eighths.

Decimal fractions are pronounced with the help of the word koma (comma):

tri koma pet — 3,5
dwa koma semshi pet — 2,75

One can also say "dwa koma semshi pet stofen".

There is also a special word for "half":

haf — half
un e haf — one and a half
dwa e haf — two and a half

•   The suffix -ple:

dwaple — double
triple — triple
charple — quadruple, etc.

In the adverbial form it becomes -plem:

dwaplem — doubly
triplem — triply

•   A noun after a numeral is not pluralized:

pet jen — five men
tristo dolar — three hundred dollars
sem pes sukra — seven pieces of sugar

•   A composite modifier "numeral + noun of measure + adjective":

tri metra glube riva — a river three meters deep
Sey mur es dwa metra gao. — This wall is 2 meters high.
Govo, pagi-ney shi yar bak! — Trupa grauli. — Nu bu fai dela om osta kel es shi yar lao! — “A bull paid ten years ago!” the Pack snarled. “What do we care for bones ten years old?”

Days of the week, months

Names for days of the week are compounds from a number and the particle 'di', Monday is counted as the first day:

undi — Monday
dwadi — Tuesday
tridi — Wednesday
chardi — Thursday
petdi — Friday
sitdi — Saturday
semdi — Sunday

Names for months are based on Latin ones, which are spread very widely. However, compounds ("month"+number) are also acceptable:

January — januar (mes-un)
February — februar (mes-dwa)
March — marto (mes-tri)
April — april (mes-char)
May — mey (mes-pet)
June — yuni (mes-sit)
July — yuli (mes-sem)
August — augusto (mes-ot)
September — septemba (mes-nin)
October — oktoba (mes-shi)
November — novemba (mes-shi-un)
December — desemba (mes-shi-dwa)

Possible ways of expressing the date:

Dey dwashi-un de mes-nin. — The twenty first of September.
Dey 21 mes 9 yar 1945. — The 21 September 1945.