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