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Efectuați in doua moduri :
7 × ( 354 + 50 )


Răspuns :

[tex]\bold{1 \ mod:}7*(354+50)=7*404=\boxed{2828}. \\ \bold{2 \ mod:}7*(354+50)=7*354+7*50=2478+350=\boxed{2828}.[/tex]