Tính bằng cách hợp lý
- \(11\frac{4}{5}-\left(17\frac{3}{4}+11\frac{4}{5}\right)+2\frac{3}{4}\)
- \(4\frac{11}{23}+3\frac{4}{5}-2\frac{11}{23}\)
- \(\frac{-27}{26}-\frac{-5}{21}+\frac{1}{26}+\frac{16}{21}+50\%\)
- \(-2\frac{2}{3}+\left(-0,2\right)+1.75-\frac{5}{0}+0,7\)