为什么1/3×3=1,而1/3=0.3...,0.3...×3=0.9...?
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![为什么1/3×3=1,而1/3=0.3...,0.3...×3=0.9...?](/uploads/image/z/14186398-22-8.jpg?t=%E4%B8%BA%E4%BB%80%E4%B9%881%2F3%C3%973%EF%BC%9D1%2C%E8%80%8C1%2F3%EF%BC%9D0.3...%2C0.3...%C3%973%EF%BC%9D0.9...%3F)
为什么1/3×3=1,而1/3=0.3...,0.3...×3=0.9...?
为什么1/3×3=1,而1/3=0.3...,0.3...×3=0.9...?
为什么1/3×3=1,而1/3=0.3...,0.3...×3=0.9...?
因为0.3后面的无限循环小数毕竟是达不到真正的1/3这个值的.有很微小的误差,乘以3之后误差大了一点点,但始终是不等于1的.这有点像障眼法.
晕死,那是无线循环的小数。0.99999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999...
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晕死,那是无线循环的小数。0.9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999………………和1差多少!你非要分开算,谁都没有办法!
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一个是分数,一个是小数,你那个1/3不是等于0.333333.......的
1/3约等于0.3,画等号是错误的。
大学会学到0.9999999循环等于1