17/25*29/37+18/25*13/37=?简便算法
问题描述:
17/25*29/37+18/25*13/37=?简便算法
答
17/25*29/37+18/25*13/37
=1/25*1/37*(17*29+18*13)
=1/25*1/37*(493+234)
=1/25*1/37*727
=727/925