Найдите значение выражение 1) 15 целых 4/9 - 4 целых 4/9 * 3 целых 3/8 2)81/88 * (6-1целая13/15*1целая19/21) 3) (5целых1/16

1) 15 4/9 - 4 4/9 * 3 3/8 = 15 4/9 - 40/9 * 27/8 = 15 4/9 - 15 = 4/9 .Ответ : 4/9 . 2) 81/88 * (6 - 1 13/15 * 1 19/21) = 81/88 * (6 - 28/15 * 40/21) = 81/88 * (6 - 4/3 * 8/3) = 81/88 * (6 - 32/9) = 81/88 * (54/9 - 32/9) = 81/88 * 22/9 = 9/4 = 2 1/4 .Ответ : 2 1/4.3) (5 1/16 - 1 1/8) * (5/6 + 3/14) = (81/16 - 9/8) * (5/6 + 3/14) = (81 * 1 - 9 * 2)/16 * (5 * 7 + 3 * 3)/42 = (81 - 18)/16 * (35 + 9)/42 = 63/16 * 44/42 = 63/16 * 22/21 = 3/8 * 11 = 33/8 = 4 1/8 .Ответ : 4 1/8 .4) 5 1/16 - 1 1/8 * (5/6 + 3/14) = 5 1/16 - 1 1/8 * (5 * 7 + 3 * 3)/42 = 5 1/16 - 1 1/8 * 44/42 = 81/16 - 9/8 * 22/21 = 81/16 - 3/4 * 11/7 = 81/16 - 33/28 = (81 * 7 - 33 * 4)/112 = (567 - 132)/112 = 435/112 = 3 99/112.Ответ : 3 99/112 .