600 - (80-25) =,100: (172-18*4) = 5 * (30+170) - 160: (4*2) = (3700+300-100) : 100=

Первый пример.

600 - (80 - 25) = 545;

80 - 25 = 55;

600 - 55 = 545.

Второй пример.

100 : (172 - 18 * 4) = 1;

18 * 4 = 72;

172 - 72 = 100;

100 / 100 = 1.

Третий пример.

5 * (30 + 170) - 160 : (4 * 2) = 980;

30 + 170 = 200;

5 * 200 = 1000;

4 * 2 = 8;

160 / 8 = 20;

1000 - 20 = 980.

Четвертый пример.

(3700 + 300 - 100) : 100 = 39;

3700 + 300 = 4000;

4000 - 100 = 3900;

3900 / 100 = 39.