口算题 200﹣87= 405+95= 7﹣1.8= 0÷3.14= ﹣= 3×0= 7÷7= 0.625﹣=
竖式计算: 308×9= 752×6=
竖式计算: 310×4= 182×5=
竖式计算: 114×5= 208×7=
竖式计算: 604×8= 520×7=