三年级数学下册三《乘法》找规律练习2(无答案)北师大版.doc

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1找规律重要知识点回顾:因数是整十数的乘法计算规律:先计算末尾 0 前面数字的乘法,然后在所得积后面添上被省略的 0。1. 口算练习。53= 34= 144= 152=103= 508= 402= 504=4040= 3080= 2430= 1550=6020= 5020= 13020= 1850=2. 填一填。(看谁填的多)( )( )=800 ( )( )=12603. 1 盘能装下 28 个鸡蛋,那么 10 盘能装多少个鸡蛋?20 盘呢?30 盘呢?

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