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