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Efectuati: [18+3.(29-3690:205)].[999-21.(11+2233:77)]

Răspuns :

[18+3•(29-18)] •[999-21•(11+29)]
(18+3•11)•(999-21•40)
(18+33)•(999-840)
51•159
8109
C 18+3 x(29-18)x999-21x(11+29)=
(18+3x 11) x (999-21x40)=
(18+ 33) x (999-840)=
51 x 159 =
8109