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Efectuati:
9•{8+7•[6+5•(4+3•(2+1))]}:(1+2+3+....+9)


Răspuns :

9x{8+7x[6+5x(4+3x3)]}:45=
=9x[8+7x(6+5x13)]:45=
=9x(8+7x71):45=
=9 x 505:45=
=4545:45=
=101