Выполните умножение а) 3/8*4 б) 12/13*26 в) 11/14*0 г) 7/9*18/49 д) 3/25*5/12 ж) 14/15*3/7 з) 1 целая 1/3*5/8 и) 2 целых 1/5*2 целых 3/11

а) 3/8 * 4 = (3 * 4) / 8 = 3/2;

б) 12/13 * 26 = (12 * 26) / 13 = 12 * 2 = 24;

в) 11/14 * 0 = 0;

г) 7/9 * 18/49 = (7 * 18) / (9 * 49) = (7 * 2 * 9) / (9 * 7 * 7) = 2/7;

д) 3/25 * 5/12 = (3 * 5) / (25 * 12) = 1 / (4 * 5) = 1/20;

ж) 14/15 * 3/7 = (14 * 3) / (15 * 7) = 2/3;

з) 1 1/3 * 5/8 = (4 * 5) / (3 * 8) = 5/6;

и) 2 1/5 * 2 3/11 = 11/5 * 25/11 = (11 * 25) / (5 * 11) = 5.