三年级数学下册六《认识分数》吃西瓜基础练习(二)北师大版.doc

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1吃西瓜1.判断。(1)一个苹果,吃掉一半,还剩 12。 ( )(2) 6- = 。 ( )(3)6 米长的绳子用去 7,剩下的绳子比用去的长。 ( )(4)盘子里有 5 个桃,小云吃了 2 个,剩下的桃占桃总数的 35。 ( )4.连一连。1-231968- 747- 859- 133.小华家养了一群鸡,其中母鸡占总数的 57,其余的是公鸡。母鸡比公鸡多总数的几分之几?答案1.(1) (2) (3) (4) 2. 3.1- = - =5727 5727372

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