99⼀百+91乘括号2⼀13-7分之一括号

2024-11-16 07:23:45
推荐回答(1个)
回答1:

99%+91x(2/13-1/7)(用分配律去括号得:
=99%+182/13-13(通分后得:
=(1287+18200-16900)/1300((分子计算得:
=2587/1300(化成带分数得:
=1又1287/1300