三年级数学下册六《认识分数》分一分(二)课堂作业北师大版.doc

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1第 2 节 分一分(二)备选例题用分数表示每幅图中每种物体的个数占全部的几分之几。苹果_桃子_胡萝卜 _茄子_解析 两幅图都是多个物体看成一个整体,个体的数量就是这个整体被等分的份数,每种物体的个数占全部的几分之几就是要表示的分数。答案 (1) 70 31 (2) 59 4备选习题(1)白猫只数占猫总数的 ( )( ) 。(2)灰猫只数占猫总数的 ( )( ) 。梨的个数占水果总数的 ( )( ) 。草莓的个数占水果总数的 ( )( ) 。菠萝的个数占水果总数的 ( )( ) 。答案源 zm1. 83 5z22. 124 5 3

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