Question

Calcule a soma entre o dobro de 2/5 com o triplo de 2/7
a) 11/9 b) 25/17 c) 58/35 d) 71/54

Answer 1

Resposta:

$(2 \times \frac{2}{5} ) + (3 \times \frac{2}{7} ) = \frac{4}{5} + \frac{6}{7} = \\ \frac{4}{5} ( \times 7) + \frac{6}{7} ( \times 5) = \\ \frac{28}{35} + \frac{30}{35} = \frac{58}{35}$