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