鞋的标码是5码，5.5码，6码，6.5码分别是多大号啊？ 幸运飞艇5码6码计划7码8码9码滚雪球

98.6×98.6-98.5×98.7＝？要简便计算 98.6*98.6-98.5*98.798.6*98.6-98.5*(98.6+0.1)98.6*98.6-98.5*98.6-9.8598.6*(98.6-98.5)-9.859.86...