1.某工队计划5天修完一条3千米的公路,平均每天修这条路的几分之几?每天修多少千米?2.五年级同学栽了80棵树,活了77棵.活的棵树是栽树总数的几分之几?3.用100千克油菜籽可榨出41千克菜籽油,1
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