三年级数学下册六《认识分数》吃西瓜同步练习(一)北师大版.doc

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1吃西瓜 一、课前一问1. 列举生活中的事例说说下面分数的意义。5412. 用分数表示下面图形的涂色部分。( ) ( )3. 比较下面分数的大小。83231 94. 试一试。(对下面计算题型大胆给出答案,仅作调查不做评价。请选择会,或不会打“”)732= (会( ),不会( )。) 732= (会( ),不会( )。) 二、课堂练习。1 94= 852= 2 75 = 43 = 31 5= 1 7=2&*答案一、1. 略2. 1/4 2/33. 4. 5/7 1/7二、1. 5/9 7/82. 3/7 1/4 3. 4/5 4/7

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