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数学
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简算1x1/2+1/2x1/3.1/99x1/100
要方法
人气:224 ℃ 时间:2020-04-20 15:23:13
解答
1x1/2+1/2x1/3.1/99x1/100
=1-1/2+1/2-1/3+...+1/99-1/100
=1-1/100
=99/100
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