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Efectuati: 7-9
6-10
7-23
1-11
8-21
1-23
-7-10
-4-11
-2-18
-6-26
0-9
0-23


Răspuns :

Răspuns:

-2

-4

-16

-10

-13

-22

-3

-7

-20

-32

-9

-23

Răspuns:

7-9=-2

6-10=-4

7-23=-16

1-11=-10

8-21=-13

1-23=-22

-7-10=-17

-4-11=-15

-2-18=-20

-6-26=-32

0-9=-9

0-23=-23