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9 supra 13 *26 supra 27 *3 supra 4 DAU COROANA URGENT !




Răspuns :

[tex] \frac{9}{13} x \frac{26}{27} x \frac{3}{4} = \\ \frac{26}{13x4} = \frac{2}{4} = \frac{1}{2} [/tex]