1.9+1.99+1.999+1.9999+1.99999+1.999999的简便运算
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1.9+1.99+1.999+1.9999+1.99999+1.999999的简便运算
![1.9+1.99+1.999+1.9999+1.99999+1.999999的简便运算](/uploads/image/z/806192-8-2.jpg?t=1.9%2B1.99%2B1.999%2B1.9999%2B1.99999%2B1.999999%E7%9A%84%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97)
2x6-(0.1+0.01+0.001+0.0001+0.00001+0.000001)
=12-0.111111
=11.888889
=12-0.111111
=11.888889