8+8*9+6=8*7-9*6=8*5:2:5=(3+4)*9-3=42:(13-6)*5=90:3:5:6=(50-9:9):7=4+36:9+92=(65+7):(4*2)=

Первый пример.

8 + 8 * 9 + 6 = 86;

8 * 9 = 72;

8 + 72 = 80;

80 + 6 = 86.

2-ой пример.

8 * 7 - 9 * 6 = 2;

8 * 7 = 56;

9 * 6 = 54;

56 - 54 = 1.

3-ий пример.

8 * 5 : 2 : 5 = 4;

8 * 5 = 40;

40 / 2 = 20;

20 / 5 = 4.

4-ый пример.

(3 + 4) * 9 - 3 = 60;

3 + 4 = 7;

7 * 9 = 63;

63 - 3 = 60.

5-ый пример.

42 : (13 - 6) * 5 = 30;

13 - 6 = 7;

42 / 7 = 6;

6 * 5 = 30.

6-ой пример.

90 : 3 : 5 : 6 = 1;

90 / 3 = 30;

30 / 5 = 6;

6 / 6 = 1.

Седьмой пример.

(50 - 9 : 9) : 7 = 7;

9 / 9 = 1;

50 - 1 = 49;

49 / 7 = 7.

Восьмой пример.

4 + 36 : 9 + 92 = 100;

36 / 9 = 4;

4 + 4 = 8;

8 + 92 = 100.

Девятый пример.

(65 + 7) : (4 * 2) = 9;

65 + 7 = 72;

4 * 2 = 8;

72 / 8 = 9.