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A rope is two fifths of a meter long. Cut off half of it in the first time, the remaining one-third in the second time, and the remaining one-quarter in the third time. How many meters is left in this rope
2/5*1/2*2/3*3/4=0.1
() is four fifths of 45 and 30 is nine fifths of ()
(36) is four fifths of 45, and 30 is nine fifths of (50 / 3)
Four ninths divided by {four fifths minus (one fifth plus one third)}
4/9÷[4/5-﹙1/5+1/3)]=4/9÷[3/5-1/3]=4/9÷4/15=4/9*15/4=5/3
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