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954:3×2-(56×8:4-105+205:5)×2

Răspuns :

=318x2-(56x8:4-105+20-5:5)x2
=636-(56x8:4-105+20-5:5)x2
=636-(464:4-105+20-5:5)x2
=636-(11+20-5:5)x2
=636-(30x2)
=636-60
=576

Sper ca tiam fost de folos