9*3*1+18= 36*6/3+52= 18/3*5-25= 54-36/6+52 19+20/4+78=

1-ый пример.

9 * 3 * 1 + 18 = 45;

9 * 3 = 27;

27 * 1 = 27;

27 + 18 = 45.

2-ой пример.

36 * 6 / 3 + 52 = 124;

36 * 6 = 216;

216 / 3 = 72;

72 + 52 = 124.

3-ий пример.

18 / 3 * 5 - 25 = 5;

18 / 3 = 6;

6 * 5 = 30;

30 - 25 = 5.

Четвертый пример.

54 - 36 / 6 + 52 = 100;

36 / 6 = 6;

54 - 6 = 48;

48 + 52 = 100.

5-ый пример.

19 + 20 / 4 + 78 = 102;

20 / 4 = 5;

19 + 5 = 24;

24 + 78 = 102.