Last modified on 14 January 2015, at 02:04

三下五除二

ChineseEdit

three; 3
 
under; second (of two parts); next (week, etc.); lower; below; underneath; down(wards); to decline; to go down; latter
five; 5
 
remove; do away with; wipe out; divide; except
two; 2
simp. and trad.
(三下五除二)

EtymologyEdit

A mnemonic device to aid with abacus addition of numbers greater than five.

Literally: three, down five, take away two

  • Ex. 3+3=6
    1. Start with three beads on the bottom (each lower bead is equal to 1).
    2. Move one of the top beads down (each top bead is equal to 5).
    3. Take away two of the beads from the bottom.
    4. This leaves you with one top bead (5) and one bottom bead (1), for a total of 6.
Step 1 Step 2 Step 3
0 0 0
0
0 0
--------------- --------------- ---------------
0 0 0
0 0
0 0 0
0
0 0 0
0 0 0

PronunciationEdit

IdiomEdit

三下五除二

  1. in an instant
  2. in the blink of an eye