Question

9/7 - 7/9 é igual á:

a) 0
b) 2/23
c) 1
d) 32/63

Answer 1

Resposta:

letra D.

Explicação passo a passo:

$\frac{9}{7} -\frac{7}{9} \\\\\frac{81}{63} -\frac{49}{63} \\\\\frac{81-49}{63} \\\\\frac{32}{63}$