每組最后一個(gè)數(shù)減前一個(gè)數(shù),再加前一個(gè)數(shù),再減前一個(gè)數(shù),都是4
8-7+5-3+1=4;6-4+2=4;9-5=4
1,3,5,7,8與2,4,6與5,9的規(guī)律
1,3,5,7,8與2,4,6與5,9的規(guī)律
數(shù)學(xué)人氣:323 ℃時(shí)間:2020-05-21 23:38:46
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