Ответ:

1 1/3.

Пошаговое объяснение:

2) (12 : а + b) : 1 1/2 - c

Если а = 3 3/5, b = 2/3, c = 1 1/3, то

(12 : 3 3/5 + 2/3) : 1 1/2 - 1 1/3 = 1 1/3.

1. 12 : 3 3/5 = 12 : 18/5 = 12•5/18 = 10/3 = 3 1/3;

2. 3 1/3 + 2/3 = 4;

3. 4 : 1 1/2 = 4 : 3/2 = 4 • 2/3 = 8/3 = 2 2/3;

4. 2 2/3 - 1 1/3 = 1 1/3.