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