(3 4/15 + 4 5/6) х (3 17/18 - 2 5/9) = (49/15 + 29/6) х (71/18 - 23/9) = (98/30 + 145/30) х (71/18 - 46/18) = 243/30 х 25/18 = 27/6 х 5/2 = 135/12 = 45/4 = 11 1/4
(3 4/15 + 4 5/6) х (3 17/18 - 2 5/9) = (49/15 + 29/6) х (71/18 - 23/9) = (98/30 + 145/30) х (71/18 - 46/18) = 243/30 х 25/18 = 27/6 х 5/2 = 135/12 = 45/4 = 11 1/4