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

1.9+1.99+1.999+1.9999+1.99999+1.999999的简便运算
2x6-(0.1+0.01+0.001+0.0001+0.00001+0.000001)
=12-0.111111
=11.888889

1.9+1.99+1.999+1.9999+1.99999+1.999999=2-0.1+2-0.01+2-0.001+2-0.0001+2-0.00001+2-0.000001=6-0.111111=5.999999

1.9+1.99+1.999+1.9999+1.99999+1.999999
=(2-0.1)+(2-0.01)+(2-0.001)+(2-0.0001)+(2-0.00001)+(2-0.000001)
=12-(0.1+0.01+0.001+0.0001+0.00001+0.000001)
=12-0.111111
=10.888889

原式＋0.1+0.01+0.001+0.0001+0.00001+0.000001+0.0000001-0.1111111＝11.999999

6＊2－（0.1+0.01+0.001......)=12－0.111111

1.99999+1.9999+1.999+1.99+1.9快来帮我! 9999+1.999+1.99+1.9等于多少 1.9+1.99+1.999简便计算求= = 1.9+1.99+1.999+1.9999+1.99999+1.999999的简便运算 简便计算; 1.9+1.99+1.999+1.9999+1.99999 28*1111+9999*8 1999+199.9+19.99+1.999 简算 1999+199.9+19.99+1.999+0.1999 1999+199.9+19.99+1.999=? 1999+199.9+19.99+1.999+0.1999 巧算 1.999+19.99+199.9+1999 1.999精确到0.01是多少 1.999精确到0.01是多少 1.999精确到0.01是多少 1.999近似值最大值和最小值 1.999保留二位小数 简便运算：1999+199.9+19.99+1.999+2.111 1999+199.9+19.99+1.999+2.111简便运算 1999+199.9+19.99+1.999=(简便运算)