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