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calculati in modul cel mai rational
a) -9+(-13)+17+(-6)+11
b) 14+(-8)+(-25)+12+7
c) 43-60+12+39-21


Răspuns :

a)-9-13+17-6+11=28-28=0
b)14-8-25+12-7=26-40=-14
c)43-60+12+39-21=94-81=13