41又1/3×3/4+51又1/4×4/5+61又1/5×5/6+71又1/6×6/7 的梯等式简便算法

问题描述:

41又1/3×3/4+51又1/4×4/5+61又1/5×5/6+71又1/6×6/7 的梯等式简便算法

=124/3×3/4+205/4×4/5+306/5×5/6+427/6×6/7
=31+41+51+61
=184