8.8+8.98+8.998+8.9998+8.99998+.8.99999999998等于多少
问题描述:
8.8+8.98+8.998+8.9998+8.99998+.8.99999999998等于多少
答
98.777777778
答
(10-1.2)+(10-1.02)+(10-1.002)+(10-1.0002)+ ......+(10-1.00000000002)
=11乘10-11.22222222222
=98.77777777778