11. - 12. gyakorló feladat megoldása
11) | – | 3 | + | 4 | = | + | 1 | 12) | – | 8 | + | 5 | = | – | 3 | |||||||
– | 9 | + | 2 | = | – | 7 | + | 9 | – | 4 | = | + | 5 | |||||||||
– | 3 | – | 3 | = | – | 6 | – | 3 | – | 8 | = | – | 1 | 1 | ||||||||
4 | – | 5 | = | – | 1 | + | 6 | + | 2 | = | + | 8 | ||||||||||
+ | 6 | – | 9 | = | – | 3 | 2 | – | 9 | = | – | 7 |