怎样简便就怎样计算．
4.98+8.02×2.5 60.8﹣40.8÷2.5 0.8×69.6×12.5
4.98×99+4.9 6.48÷3.2÷2.5 1.2×7.6+7.6×6.8．
怎样简便就怎样计算．
4.98+8.02×2.5 60.8﹣40.8÷2.5 0.8×69.6×12.5
4.98×99+4.9 6.48÷3.2÷2.5 1.2×7.6+7.6×6.8．
粤公网安备 44130202000953号