-0.636363636363相反数:0.636363636363
0.6363……×100=63.6363……
0.6363……×100-0.6363……=63.6363……-0.6363……
(100-1)×0.6363……=63
即99×0.6363…… =63
那么 0.6363……=63/99
=7/11
相反数:-7/11
-0.636363636363相反数:0.636363636363
0.6363……×100=63.6363……
0.6363……×100-0.6363……=63.6363……-0.6363……
(100-1)×0.6363……=63
即99×0.6363…… =63
那么 0.6363……=63/99
=7/11
相反数:-7/11