Respuesta :

[tex]9 \times 3 \times \frac{12}{4} = 9 \times 3 \times 3 = 81[/tex]

[tex]9\times \cfrac{3}{4}12\implies \cfrac{9\cdot 3\cdot 12}{4}\implies \cfrac{9\cdot 3}{1}\cdot \cfrac{12}{4}\implies \cfrac{27}{1}\cdot \cfrac{3}{1}\implies \cfrac{81}{1}\implies 81[/tex]