= = = == = = == =
算一算.204×2×5=312×4×2=72×3×5=130×2×5=
列竖式计算.207×32 317×38 680×45.
李伯伯家的果园今年收了430千克梨,收的苹果的重量是梨的12倍.李伯伯家今年收了多少千克苹果?
有12个班的学生去春游,平均每班有36人.(1)春游的学生有多少人?(2)平均每辆大客车坐多少人?