Найдите значение выражения: 1) 15 4/9 - 4 4/9 × 3 3/8; 2) 81/88 × ( 6 - 1 13/15 × 1 19/21); 3) ( 5 1/16 - 1 1/8)(5/6

1. 15 4/9 - 4 4/9 × 3 3/8 = 4/9 ;1) 4 4/9 * 3 3/8 = 40/9 * 27/8 = 5/1 * 3/1 = 15 ;2) 15 4/9 - 15 = 4/9.Ответ : 4/9 .2. 81/88 × ( 6 - 1 13/15 × 1 19/21) = 2 1/4 ;1) 1 13/15 * 1 19/21 = 28/15 * 40/21 = 4/3 * 8/3 = 32/9 = 3 5/9 ;2) 6 - 3 5/9 = 54/9 - 32/9 = 22/9 = 2 4/9 ;3) 81/88 * 2 4/9 = 81/88 * 22/9 = 9/4 * 1/1 = 9/4 = 2 1/4 .Ответ : 2 1/4 .3. ( 5 1/16 - 1 1/8)(5/6 + 3/14) = 4 1/8 ;1) 5 1/16 - 1 1/8 = 81/16 - 9/8 = (81 * 1 - 9 * 2)/16 = 63/16 ;2) 5/6 + 3/14 = (5 * 7 + 3 * 3)/42 = 44/42 = 22/21 = 1 1/21 ;3) 63/16 * 1 1/21 = 63/16 * 22/21 = 3/8 * 11/1 = 33/8 = 4 1/8.Ответ : 4 1/8 .4. 5 1/16 - 1 1/8 × ( 5/6 + 3/14) = 4 7/48 ;1) 5/6 + 3/14 = (5 * 7 + 3 * 3)/42 = 44/42 = 22/21 = 1 1/21 ;2) 1 1/8 * 1 1/21 = 9/8 * 22/21 = 1/4 * 11/3 = 11/12 ;3) 5 1/16 - 11/12 = 81/16 - 11/12 = (81 * 3 - 11 * 4)/48 = (243 - 44)/48 = 199/48 = 4 7/48.Ответ : 4 7/48 .