Вычислите: а) - 2/6:6 б) - 6:3/12 в) - 5/8: (-15) г) - 2/7:8/7 д) - 2/7: (-8) е) 1/45: (-2/15) ж) 2: (-2/7) з) - 5 4/9: 1/9

Вычислим значения выражений:

а) - 2/6 : 6 = - 2/6 * 1/6 = - 1/3 * 1/6 = - 1/18;

б) - 6 : 3/12 = - 6 * 12/3 = - 6 * 4 = - 24;

в) - 5/8 : (-15) = 5/8 : 15 = 5/8 * 1/15 = 5/15 * 1/8 = 1/3 * 1/8 = 1/24;

г) - 2/7 : 8/7 = - 2/7 * 7/8 = - 7/7 * 2/8 = - 2/8 = - 1/4;

д) - 2/7 : (-8) = 2/7 : 8 = 2/7 * 1/8 = 2/8 * 1/7 = 1/4 * 1/7 = 1/28;

е) 1/45 : (-2/15) = - 1/45 : 2/15 = - 1/45 * 15/2 = - 15/45 * 1/2 = - 1/3 * 1/2 = - 1/6;

ж) 2 : (-2/7) = - 2 : 2/7 = - 2 * 7/2 = - 2/2 * 7 = - 7;

з) - 5 4/9 : 1/9 = - 49/9 : 1/9 = - 49/9 * 9/1 = - 49 * 9/9 = - 49.