现有一块梯形菜地，经测数据如下：每平方米收菜12千克，共收菜多少千克？
直接写出得数．= = = 1÷80%=1÷×= = 3.5×= 2﹣=
直接写出得数= = = =
直接写出下面各题的结果．÷= ÷4= 18÷= 10÷10%= （﹣）×6=﹣×0= 8﹣﹣= 102﹣52= ×2010= 12.5×3.5×0.08=
直接写出的数= = 9.3+9.3×99=35%：40%= = =
五•一班25名男同学，20名女同学．男、女同学各占全班人数的几分之几？
= 
= 
= 1÷80%=
×
= 
= 3.5×
= 2﹣
=
= 
= 
= 
=
÷
= 
÷4= 18÷
= 10÷10%= （
﹣
）×6=
﹣
﹣
= 102﹣52= 
×2010= 12.5×3.5×0.08=
= 
= 9.3+9.3×99=
= 
=
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