三年级数学下册六《认识分数》分一分(一)基础练习1北师大版.doc

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1分一分(一)1.按要求把下面各图形涂上颜色。 1212 122.填空。(1)把一张正方形纸对折再对折,是把这张正方形纸平均分成( )份,每份是它的( ) 。(2)把一条线段平均分成 9 份,其中的 1 份是它的 ( )( ) ,7 份是它的 ( )( ) ,这条线段共有( )个 。3.选择。(1)下面各图中的阴影部分不能用 表示的是( ) 。(2)下面各图中的阴影部分表示 的是( ) 。(3)下面各图中的空白部分表示 的是( ) 。(4)把一块蛋糕切去一半后,剩下的平均分给 4 个人吃,每个人吃这块蛋糕的( ) 。A. B. 2答案1.略2.(1)4 (2) 914 19 793.(1)A (2)B (3)A (4)B

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