[dao4 shu3] /to count backwards (from 10 down to 0)/to count down/from the bottom (lines on a page)/from the back (rows of seats)/
  [dao4 shu3] /Kehrwert, reziproker Wert (u.E.) (S)/
  [dao4 shu4] /inverse/
Visszatérés a(z) „倒数” laphoz.