Ответ:

1) (1 3/25 — 4/25) : (1 — 2/5) * (10 — 9 1/16) = (28/25 — 4/25) : (5/5 — 2/5) * (160/16 — 145/16) = 24/25 : 3/5 * 15/16 = 24/25 * 5/3 * 15/16 = 3/2;

Ответ: 3/2.

2) (1 + 7/23) * (2 — 4/25) : (99 — 98 1/5) = (23/23 + 7/23) * (50/25 — 4/25) : (495/5 — 491/5) = 30/23 * 46/25 : 4/5 = 30 * 2/25 * 5/4 = 3;

Ответ: 3.