分数简便运算:1.27*136/137+136*20/137+180*68/137
问题描述：
分数简便运算:1.27*136/137+136*20/137+180*68/137
1.27乘以137分之136加136乘以137分之20加180乘以137分之68 怎么简便运算
答
27*136/137+136*20/137+180*68/137
=27*136/137+20*136/137+90*2*68/137
=27*136/137+20*136/137+90*136/137
=(27+20+90)*136/137
=137*136/137
=136