As far as I know the only published example is "hue yullume i hualqe" (twice nine is eighteen) in the Early Qenya Grammar (published in PE14). "Hue" is nine, "yullume" means twice, and "hualqe" means eighteen.
No worries:) What Olga has cited above from PE14 shows that Tolkien imagined it rather simple: a -lume suffix is quite close to the English 'times'. Presumably the other 3 operations would be rendered in a similarly simple way.
Following that, an *-(a)sta suffix to denote division wouldn't be that far-fetched; the questions is though, is it the dividend or the divisor that would get the suffix.
I'm musing on whether you could use lû to a similar purpose in Sindarin now, given I already use minlû to mean 'once' (literally 'one time'), leben tadlû cae...
Samilve nóti tenna neterque; nas pia néka imbi 20 ar 24; ta nótello yurasta quíta eke men intya nóti ve *nelrasta, *carrasta, nete nete? (Quíta 114 ná *yunquerasta?)
I'm not sure about duodecimal system. PE14 grammars and lists of numbers in VT48 show plain decimal one. And I don't know what to do with rejection of "cainen" (was it changed into "quean"?).
Olga García Jan 04, 2013 (22:48)
Ицхак Пензев Jan 05, 2013 (17:41)
Tamas Ferencz Jan 05, 2013 (20:55)
Olga García Jan 06, 2013 (14:36)
So neldellume=three times, kantallume=four times and so forth.
Tamas Ferencz Jan 07, 2013 (10:03)
Jenna Carpenter Jan 07, 2013 (16:30)
Tamas Ferencz Jan 07, 2013 (16:48)
Ицхак Пензев Jan 07, 2013 (18:39)
Tamas Ferencz Jan 08, 2013 (10:42)
Ицхак Пензев Jan 11, 2013 (14:04)
Jenna Carpenter Jan 14, 2013 (12:48)
Tamas Ferencz Jan 14, 2013 (13:08)
Jenna Carpenter Jan 14, 2013 (18:02)
Tamas Ferencz Jan 14, 2013 (18:09)