找规律填一填83,78,( ) ,( ),( ),68,
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![找规律填一填83,78,( ) ,( ),( ),68,](/uploads/image/z/2722444-52-4.jpg?t=%E6%89%BE%E8%A7%84%E5%BE%8B%E5%A1%AB%E4%B8%80%E5%A1%AB83%2C78%2C%28+%29+%2C%28+%29%2C%28+%29%2C68%2C)
找规律填一填83,78,( ) ,( ),( ),68,
找规律填一填83,78,( ) ,( ),( ),68,
找规律填一填83,78,( ) ,( ),( ),68,
74 71 69
83,78,( 74) ,(71 ),( 69),68,
依次减去54321
83,78,(74 ) ,(71 ),( 69),68,
83-5=78
78-4=74
74-3=71
71-2=69
69-1=68
83,78,( 74) ,(71 ),( 69),68