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Calculati:
c)(+8)+(-5);
(+6)+(-6);
-21+(+29);
-18-26;

d)-11+6;
+12-24;
+25-26;
-25+25;


Răspuns :

c)8-5=3
6-6=0
-21+29=8
-18-26=-44

d)-11+6=-5
12-24=-12
25-26=-1
-25+25=0