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2 ori 1 pe 3 ori 4 pe 7 +9 pe 5 ÷ 3 - 1 pe 2

Răspuns :

[tex]2* \frac{1}{3} * \frac{4}{7} + \frac{9}{5} : \frac{3-1}{2} =\\\\ \frac{2}{3} * \frac{4}{7} + \frac{18}{10} =\\\\ \frac{8}{21} + \frac{18}{10}=\\\\ \frac{80}{210} + \frac{378}{210}= \\\\ \frac{458}{210} =2,18 [/tex]