儿童三轮车每辆的价钱是90元.幼儿园买了4辆,一共用了多少钱?
×+× (13+)× ×12+×× ×(﹣×) ×11﹣×34×7× +++ ×48.
神机妙算细又巧.(计算下面各题能简算的要简算)(1)×21× (2)÷0.6×(3)2﹣÷﹣ (4)(5) (6)(+)×17+22÷39.
计算,能简算的要简算:××5 ÷[(+)×] 24×(+﹣)100× (+×)÷ 1﹣÷﹣.
直接写出得数.= = = == = = =
下面各题,怎样简便就怎样算+× ×﹣ ×× ××.