Выполните вычитание: 1) 5/9 - (-1/6); 4) -14/25 - (-7/10); 7) 2 9/20 - 4 17/30; 2) 3/16 - 11/24; 5) 2 3/7 - (-1 2/5);

1) 5/9 - (-1/6) = 5/9 + 1/6 = (10+3)/18=13/18; 2) 3/16 - 11/24=(9-22)/48=-13/48; 3) -7/9 - 2/15 = (-35-6)/45= -41/45;4) -14/25 - (-7/10) = -14/25 + 7/10 = (-28+35)/50=7/50;5) 2 3/7 - (-1 2/5) = 2 3/7 + 1 2/5 =3 + (21+10)/35 = 3 31/35; 6) 5 12/35 - 10 = -4 23/35; 7) 2 9/20 - 4 17/30 =-2 + (27-34)/60 = -2 + (-7/60)= -2 7/60;8) -3 8/9 - 4 1/12 = -7 + (-32-3)/36 = -7 35/36;9) -4 3/16 - (-5 5/8) =-4 3/16 + 5 5/8 = 1 10/16 - 3/16=1 7/16.