1找规律基础习题一、口算1.53= 34= 144= 2.103= 508= 402= 3.4040= 3080= 2430= 4.6020= 5020= 13020= 二、填空1.562112 5602( )2.14570 1405( )3.258200 25080( )4.29387 2903( )5.96171632 96017( )三、连线2430 2240 1650 8020880 720 1600 800
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