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Rezolvarea problemei [55×5-(199-99×2+20×5)×220:10]:4


Răspuns :

[55×5-(199-99×2+20×5)×220:10]:4=275-(199-99×2+20×5)×220:10]:4
=275-(199-198+20×5)×220:10]:4
=275-(1+20×5)×220:10]:4
=275-(1+110)×220:10]:4
=275-111×220:10]:4
=164×220:10]:4
=164×2200]:4
=164×550 =90;200