1. feladat megoldása tovább megoldás
| 4 | 5 | + | 1 | 7 |
|
4 | 2 | + | 3 | 3 | – | 5 | 1 | = | 9 | 5 | – | 9 | 3 | = | |||
| – | 5 | 0 | + | 1 | 4 |
|
1 | 8 | + | 3 | 4 | + | 1 | 8 | = | 4 | 8 | – | 5 | 0 | = | ||
| – | 1 | 2 | – | 3 | 5 | + | 2 | 4 | + | 5 | 8 | – | 3 | 8 | = | 8 | 2 | – | 8 | 5 | = | ||
| + | 4 | 7 | + | 9 | 6 | – | 3 | + | 2 | 2 | – | 7 | 8 | = | 1 | 6 | 5 | – | 8 | 1 | = | ||
| 3 | 8 | – | 1 | 2 | + | 5 | 7 | – | 7 | 6 | – | 7 | = | 9 | 5 | – | 9 | 5 | = |