第一個數(shù)加上最后一個數(shù)乘以總數(shù)的一半,這是規(guī)律
（0.01+0.99）*49.5=49.5
第一個數(shù)0.01 最后一個數(shù)0.99
0.01到0.99總的是99個數(shù),它的一半就是99除以2,就是49.5
提問:0,01十0.02十0.03…o,97十O,98+0.99=
提問:0,01十0.02十0.03…o,97十O,98+0.99=
數(shù)學(xué)人氣：726 ℃時間：2019-09-21 00:18:10
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