Ответ:\(1-\frac15=\frac45\).\(1-\frac56=\frac16\).\(2-\frac{29}{27}=\frac{25}{27}\).\(3-2=1\).Ответ: 1) \(\frac45\); 2) \(\frac16\); 3) \(\frac{25}{27}\); 4) 1.