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2014-05-14T21:40:15+03:00
I scandura:   I-----I
II scandura:  I-----I+28 cm
4m=400 cm
400 cm-28 cm=372 cm
372 cm:2=186 cm are prima scandura
Cat are a II a scandura?
186 cm+28 cm=214 cm
verificare
186 cm+214 cm=400 cm=4m
40 3 40