Сколько будет: 7 5/9 - 2 8/9 7- 3/8 10 -3 7/15

1) 7 5/9 - 2 8/9 = (7 * 9 + 5)/9 - (2 * 9 + 8)/9 = (63 + 5)/9 - (18 + 8)/9 = 68/9 - 26/9 = (68 - 26)/9 = 42/9 = 14/3;

Ответ: 14/3.

2) 7- 3/8 = 7 * 8/8 - 3/8 = (56 - 3)/8 = 53/8;

Ответ: 53/8.

3) 10 - 3 7/15 = 10 - (3 * 15 + 7)/15 = 150/15 - (45 + 7)/15 = (150 - 52)/15 = 98/15;

Ответ: 98/15.