Question

\(-1-\frac{1}{10}-\frac{1}{100}-\frac{1}{1000}-\frac{1}{10000}\)

Answer 1

   \(-1-\frac{1}{10}-\frac{1}{100}-\frac{1}{1000}-\frac{1}{10000}\)

\(=-\frac{10000}{10000}-\frac{1000}{10000}-\frac{100}{10000}-\frac{10}{10000}-\frac{1}{10000}\)

\(=\frac{-10000-1000-100-10-1}{10000}\)

\(=-\frac{11111}{10000}=-1,1111\)

Answer 2

\(=-\left(1+\frac{1}{10}+\frac{1}{100}+\frac{1}{1000}+\frac{1}{10000}\right)\)

\(=-\left(\frac{10000}{10000}+\frac{1000}{10000}+\frac{100}{10000}+\frac{1}{10000}\right)\)

\(=-\left(\frac{10000+1000+100+10+1}{10000}\right)\)

\(=-\left(\frac{11111}{10000}\right)\)

Vậy.....