Question

3 1/4 de 3 1/2 ÷ 2/5 de 2-3/4​

Answer 1

Resposta:

91/4

Explicação:

$(3\frac{1}{4} \times 3\frac{1}{2}) \div \frac{2}{5} \times (2 - \frac{3}{4} ) = \\ = ( \frac{3 \times 4 + 1}{4} ) \times ( \frac{3 \times 2 + 1}{2} ) \div \\ \frac{2}{5} \times ( \frac{2 \times 4 - 3}{4} )$

$\\ = (\frac{13}{4} \times \frac{7}{2} ) \div \frac{2}{5} \times \frac{5}{4} = \\ = \frac{13 \times 7}{4 \times 2} \div \frac{1}{2} = \frac{91}{4 \times 2} \times \frac{2}{ 1} = \frac{91}{4}$