题1、(1) 0.012、0.021、0.102、0.201
(2)1.002 、2.001、10.02、睁指察20.01
题逗孝2
0.9+0.99+0.999+0.9999
=(1-0.1)+(1-0.01)悉茄+(1-0.001)+(1-0.0001)
=1x4-0.1111
=4-0,1111
=3.8889
0.012 0.021 0.201 0.102 1.002 2.001 20.01 10.02
(1-0.1)+(1-0.01)哗卖轿+(1-0.001)+(乱肆1-0.0001)配磨
1.
(1)0.012
0.021
0.201
0.102
(2)1.002
10.02
2.001
20.01
2.
0.9+0.99+0.999+0.9999
=(1-0.1)+(1-0.01)+(1-0.001)+(1-0.0001)
=1-0.1+1-0.01+1-0.001+1-0.0001
=4-0.1111
=3.8889