王大爷在一块长15米，宽6米的菜地种油菜，如果每平方米收油菜籽4千克，这块地今年一共可以收油菜籽多少千克？
直接写出得数．= = = =2÷3= = = =
+= ﹣= ×= 14÷=÷= ×= ÷= 6×=
直接写得数：1﹣= 9×= ÷2= ÷== 1= ×1.3= ×=
直接写出下面各题的得数．÷= = =1.25×0.8= = =1﹣30%= 5.4÷0.3= 9﹣0.56=
直接写出得数．﹣= ÷6= ÷= 6×=×= ﹣= ×= ÷=
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