27x2/3= 5/6除以5/18= 5/6除以4/9= 6/7除以3=3/5x5/6= 5/21x14= 12除以2/3= 5/8x16/17=5/7x7/8= 2/3x5/8=3/4除以1/2= 24除以3/4=5/9x6/7= 4/7x3/4=42x1/6= 2/3除以5/9=1/3x5/8= 3/5x7/10=5/12x3/4= 1/6除以5/9=... 27x2/3= 5/6除以5/18= 5/6除以4/9= 6/7除以3=3/5x5/6= 5/21x14= 12除以2/3= 5/8x16/17=5/7x7/8= 2/3x5/8=3/4除以1/2= 24除以3/4=5/9x6/7= 4/7x3/4=42x1/6= 2/3除以5/9=1/3x5/8= 3/5x7/10=5/12x3/4= 1/6除以5/9=...