easy, one minutes i solve the problem9 r I. W+ U' f/ J6 [1 f
divide into half, mean 6/ 6
! p$ {) c5 Z; v( ^! j# I9 ttake the heavier 6 ping pongtvb now,tvbnow,bttvb! C# v9 M' }2 q; f5 F/ v3 o
divide into 3/3, take the heavier 3; m8 G4 w* K* m6 _9 x" X
take the the other 3 that have the equal weight, switch each to measure, the most important things is labeling the ping pong so that we can recognize |
發表於 2009-2-8 04:58 PM
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