来自毛小锋的问题
0.9+0.99+0.999+0.9999+0.999993333×3333.
0.9+0.99+0.999+0.9999+0.99999
3333×3333.
1回答
2020-05-25 01:37
0.9+0.99+0.999+0.9999+0.999993333×3333.
0.9+0.99+0.999+0.9999+0.99999
3333×3333.
(1)0.9+0.99+0.999+0.9999+0.99999,=(1-0.1)+(1-0.01)+(1-0.001)+(1-0.0001)+(1-0.00001),=5-0.11111,=4.88889;(2)3333×3333,=3333×(1111×3),=(3333×3)×1111,=9999×1111,=(10000-1...