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Calculati:9/20-(1/5+1/4) va roog ajutatima e urgent dau coronitaaaaa!!!!!!!!!!!!

Răspuns :

[tex] \frac{9}{20}-( \frac{1}{5} + \frac{1}{4}) = [/tex]
[tex] \frac{9}{20} - (\frac{4}{20}+ \frac{5}{20} )= [/tex]
[tex] \frac{9}{20} - \frac{9}{20} =0[/tex]