题目内容
计算下题，能简算的要简算．
18.6×[1÷(8.1－8.09)]
1860
(7.7＋2.8×0.7)÷(0.6－0.48)
7.321÷5÷0.2
2.5×0.32×1.25
(0.8×0.4＋0.8×0.6)×1.25
