找规律73,64,53,42,31,( )( )
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找规律73,64,53,42,31,( )( )
找规律73,64,53,42,31,( )( )
找规律73,64,53,42,31,( )( )
73,64,53,42,31,( 20)( 9)
73 -64 = 9
64- 53 =11
53 - 42 = 11
42-31 = 11
31-11 = 20
20-11 = 9
73,64,53,42,31,(22 )( 11)
感觉题目有点问题吧。。。应该第一个是75.每个都减11,所以两个括号填20,9