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Iarna5
a fost răspuns

Calculeaza:91-28+18-56+25-49+69-58=

Răspuns :

91-28+18-56+25-49+69-58=
=63+18-56+25-49+69-58=
=81-56+25-49+69-58=
=25+25-49+69-58=
=50-49+69-58=
=1+69-58=
=70-58=
=12