Calculează în scris:
1 2 4 7 5 6 +
5 2 3 9

7 3 7 1 4 9 +
2 1 2 9 7

3 8 4 5 6 7 +
1 0 4 8 7 9

5 3 5 1 6 9 +
2 1 6 9 7 4

7 0 7 6 3 2 +
1 9 6 7 8 4

3 0 8 2 6 3 +
4 6 0 7 5

2 7 5 6 4 +
9 9 9 9

6 1 4 8 3 2 +
1 9 8 5 7 9

2 3 4 6 0 0-
1 2 1 7 2 3

8 4 0 5 2 4-
1 0 0 3 8 5

6 0 0 0 0-
1 7 2 3 4

7 5 8 9 6 1-
2 4 5 3 2

1 5 4 3 3 2-
9 2 1 72

9 3 0 0 2-
5 7 6 3

5 0 3 1 2-
4 9 4 0 5

8 0 0 0 0 0 -
7 2 5 1 3 9
​