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[(28x5:2x10)x5]+[31x(600:5+112:4)–83]=,

Răspuns :

[(28•5:2•10)•5]+[31•(600:5+112:4)-83]=
=[(140:20)•5]+[31•(120+28)-83]
=(7•5)+(31•148-83)=
=35+(179-83)=
=35+96=
=131.



Sper că te-am ajutat!