111...1×999...911111111...1(2008个1)×999999999...9(2008个9)=?要求清楚,快,

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/19 13:30:51
111...1×999...911111111...1(2008个1)×999999999...9(2008个9)=?要求清楚,快,111...1×999...911111111...1(2008个1

111...1×999...911111111...1(2008个1)×999999999...9(2008个9)=?要求清楚,快,
111...1×999...9
11111111...1(2008个1)×999999999...9(2008个9)=?
要求清楚,快,

111...1×999...911111111...1(2008个1)×999999999...9(2008个9)=?要求清楚,快,
11111111...1(2008个1)×999999999...9(2008个9)
=11111111...1(2008个1)×(10000000...(2008个0)-1)
=1111111...100000...0(2008个1,2008个0)-11111111...1(2008个1)
=11111...1(2007个1)0888888.(2007个8)9