分数的简便运算:(1+1/51)+(3+3/51)+(5+5/51)+(7+7/51)+.+(97+97/51)+(99+99/51)
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![分数的简便运算:(1+1/51)+(3+3/51)+(5+5/51)+(7+7/51)+.+(97+97/51)+(99+99/51)](/uploads/image/z/241837-61-7.jpg?t=%E5%88%86%E6%95%B0%E7%9A%84%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97%EF%BC%9A%281%2B1%2F51%29%2B%283%2B3%2F51%29%2B%285%2B5%2F51%29%2B%287%2B7%2F51%29%2B.%2B%2897%2B97%2F51%29%2B%2899%2B99%2F51%29)
分数的简便运算:(1+1/51)+(3+3/51)+(5+5/51)+(7+7/51)+.+(97+97/51)+(99+99/51)
分数的简便运算:(1+1/51)+(3+3/51)+(5+5/51)+(7+7/51)+.+(97+97/51)+(99+99/51)
分数的简便运算:(1+1/51)+(3+3/51)+(5+5/51)+(7+7/51)+.+(97+97/51)+(99+99/51)
(1+1/51)+(3+3/51)+(5+5/51)+(7+7/51)+.+(97+97/51)+(99+99/51)
=(1+3+5+..+99)+(1+3+..+99)/51
=52/51(1+3+..+99)
=52/51×(1+99)×50/2
=52/51×2500
=130000/51
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