用竖式计算下列各题.①35×46=②306×52=③360×25=④4635×132=
直接写出得数.= = = == = = =
口算.4.2÷= ×3= ÷5= (+)×72=×12= ×1.8= ÷=
= = = == = = =
直接写出得出.20×= ÷= ×= +=÷6= ×12= += 6÷=﹣= ×= ×= 0÷=
直接写出得数.6×= ÷7= ÷= 4×1= ×= ÷=÷5= 5×= ﹣= +0.5= 1÷1= 1÷1=