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 积的变化规律。                                                                                                                                                                                                       

根据李大伯向鱼塘投放饮料的情况,完成下表。                                                                                                                               

每天投放饲料(kg)

12

时间(天)

1

5

10

15

20

30

投放饲料总量(kg)


在乘法算式中,一个因数不变,另一个因数扩大或缩小,积就。                                                                                          

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