mk lấy xấp xỉ nhé
\(1,\left(54\right)\approx1,55\)
\(0,\left(81\right)\approx0,82\)
\(1,\left(54\right)-0\left(81\right)\approx1,55-0,82\approx0,73\)
hk tốt
\(1,\left(54\right)\approx2\)
\(0,\left(81\right)\approx1\)
\(1,\left(54\right)-0,\left(81\right)\approx2-1\approx1\)
hk tốt
\(1,\left(54\right)-0,\left(81\right)\)
\(=\left(1+54.\frac{1}{99}\right)-\left(81.\frac{1}{99}\right)\)
\(=\frac{17}{11}-\frac{9}{11}\)
\(=\frac{8}{11}\)
