41又1/3x3/4+51又1/4x4/5+61又1/5X5/6=(41+1/3)3/4+(51+1/4)4/5+(61+1/5)5/6=123/4+1/4+204/5+1/5+305/6+1/6=124/4+205/5+306/6=31+41+51=123
=124/3×3/4+205/4×4/5+306/5×5/6=31+41+51=123