Вычислите: 1) 5/9 + 1 5/7 • (4 2/3 - 2 5/8) : 1 3/4; 2) 2 - 3 1/7 • (2 - 1 9/11) : 8/21;...

Question

Вычислите: 1) 5/9 + 1 5/7 • (4 2/3 - 2 5/8) : 1 3/4; 2) 2 - 3 1/7 • (2 - 1 9/11) : 8/21; 3) 2 1/3 + 4 1/10 : (2 7/15 - 5/12) • 5/6; 4) 4 5/12 - 1 1/2 : (2 1/6 + 8/15) • 1 4/5.

---

Answer 1

.........................

---