51又2/3×3/5＋71又3/4×4/7＋91又4/5×5/9
来源：学生作业帮助网 编辑：六六作业网 时间：2024/11/22 08:40:50
51又2/3×3/5＋71又3/4×4/7＋91又4/5×5/951又2/3×3/5＋71又3/4×4/7＋91又4/5×5/951又2/3×3/5＋71又3/4×4/7＋91又4/5×5/951又2
51又2/3×3/5＋71又3/4×4/7＋91又4/5×5/9
51又2/3×3/5＋71又3/4×4/7＋91又4/5×5/9
51又2/3×3/5＋71又3/4×4/7＋91又4/5×5/9
51又2/3×3/5＋71又3/4×4/7＋91又4/5×5/9
=155/3×3/5+287/4×4/7+459/5×5/9
=155/5+287/7+459/9
=31+41+51
=123