Question

Calcule o valor da expressão numerica a seguir:
(-2 - 2/5) . (-3/5) elevado a 2
a) -27/20
b) -20/27
c) 23/27
d) 27/13​

Answer 1

Resposta:

A) \frac{7}{13} + \frac{2}{13} =  \frac{9}{13}  \\ \\ B) \frac{10}{3} - \frac{7}{3} =  \frac{3}{3} = 1 \\ \\ C) \frac{1}{3} + \frac{2}{5} =  \frac{5 + 6}{15} =  \frac{11}{15}   \\ \\ D) \frac{3}{4} + \frac{5}{6} - \frac{1}{2} =  \frac{9+10-6}{12} =  \frac{13}{12}

E) \frac{3}{4}. \frac{1}{2} = \frac{3}{8} \\ \\ F) \frac{9}{7}.\frac{3}{4} = \frac{27}{28} \\ \\ G) \frac{6}{15} : \frac{2}{3} = \frac{6}{15}.\frac{3}{2} = \frac{18}{30} = \frac{6}{10} = \frac{3}{5} \\ \\ H) \frac{81}{5} : \frac{27}{25} = \frac{81}{5}.\frac{25}{27} = \frac{2025}{135} = 15

Explicação passo-a-passo: