(2 4/5+2 2/3):(10 13/30-3 5/5)×2,5=(2 5/14×4 2/3+12 :2/4-15 14):(4 7/18-2 5/9)=

(2 4/5 + 2 2/3) : (10 13/30 - 3 5/5) × 2,5.

2 4/5 = 2,8.

4 : 5 = 0,8;

0,8 + 2 = 2,8.

2 2/3 = 2,66.

2 : 3 = 0,66;

0,66 + 2 = 2,66.

10 13/30 = 10,43.

13 : 30 = 0,43;

0,43 + 10 = 10,43.

3 5/5 = 4.

5 : 5 = 1;

1 + 3 = 4.

(2,8 + 2,66) : (10,43 - 4) * 2,5 = 2,12.

2,8 + 2,66 = 5,46;

10,43 - 4 = 6,43;

5.6 : 6,43 = 0,84;

0,84 * 2,5 = 2,12.

(2 5/14 × 4 2/3 + 12 : 2/4 - 15/14) : (4 7/18 - 2 5/9).

2 5/14 = 2,35.

5 : 14 = 0,35;

0,35 + 2 = 2,35.

4 2/3 = 4,66.

2 : 3 = 0,66;

0,66 + 4 = 4,66.

2/4 = 0,5.

2 : 4 = 0,5.

15/14 = 1,07.

15 : 14 = 1,07.

4 7/18 = 4,38.

7 : 18 = 0,38;

0,38 + 4 = 4,38.

2 5/9 = 2,55.

5 : 9 = 0,55;

0,55 + 2 = 2,55.

(2,35 * 4,66 + 12 : 0,5 - 1,07) : (4,38 - 2,55) = 18,51.

2,35 * 4,66 = 10,95;

12 : 0,5 = 24;

10,95 + 24 = 34,95;

34,95 - 1,07 = 33,88;

4,38 - 2,55 = 1,83;

33,88 : 1,83 = 18,51.