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Calculati in doua moduri :
576*(9-3)=
812*(4+5)=
86*2*5=
98*4*2=


Răspuns :

576*(9-3)=
576x6=3456
576x9-576x3=5184-1728=3456

812*(4+5)=
812x9=7308
812x4+812x5=3248+4060=7308

86*2*5=172x5=860
86x(2x5)=86x10=860

98*4*2=392x2=784
(98x4)x2=392x2=784