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1)5+(...)=+10
2)+2+(...)=+14
3)-5+(...)=-10
4)-3+(...)=-9
5)-12+(...)=-2
6)-6+(...)=+4
7)-8(...)=-1
8)-7+(...)=0
9)-2+(...) =+8
10)7+(...)=-3
11)+2(...)=-6
12)-48+(...)=-23

Răspuns :

5+5=+1
+2+(+12)=+14
-5+(-5)=-1
-3+(-6)=-9
-12+(+10)=-2
-6+(+10)=+4
7)  -8+(+9)=-1  sau -8-(+7)=-1
8) -7+(+7)=0
9) -2+(+10)=+8
10)  7+(-10)=-3
11) +2x(-3)=-6 sau daca ai vrut sa pui plus: +2+(-8)=-6 sau pt -:  +2-(+8)=-6
12) -48+(+25)=-23

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