0.55555...=多少分之几

问题描述:

0.55555...=多少分之几

设x=0.5555.①
10x=5.5555.②
②-①得10x-x=5.555.-0.555.
9x=5
X=5/9【48,12】=多少分之几48.12=4812/100=1203/25