85又1／3x3／8＋75又5／6x6／7＋56又1／4x4／5这道题怎样简便运算
问题描述：
85又1／3x3／8＋75又5／6x6／7＋56又1／4x4／5这道题怎样简便运算
答
85又1／3x3／8＋75又5／6x6／7＋56又1／4x4／5=(85+1/3)x3/8+(75+5/6)x6/7+(56+1/4)x4/5=(80+15/3+1/3)x3/8+(70+30/6+5/6)x6/7+(55+4/4+1/4)x4/5=(80+16/3)x3/8+(70+35/6)x6/7+(55+5/4)x4/5=80x3/8+16/3x3/8+70x6/7+...