列竖式计算，带*的要验算．84÷4= *94÷6= *65÷5═ 208×7= 6×283= 160×5=
简便运算．125×3.2×2.5 0.9+99×0.9．
．
15.06﹣5.27﹣4.73．
4999+499+49+3．
125×3.2×2.5 0.9+99×0.9．
．
．
粤公网安备 44130202000953号