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31\10 + 28/9 =?
Dau coronita! Raspunsul vreau sub forma de fractie ordinara.


Răspuns :

[tex] \frac{31}{10} + \frac{28}{9} = \frac{31*9+28*10}{10*9} = \frac{279+280}{90} = \frac{559}{90} [/tex]