Question

5. Determine o valor de cada expressão
numerica
a)2/3 : 4/5 +1/2
b)1/2 - 5/8 : 5/4​

Answer 1

Resposta:

a) 4/3

b) 0

Explicação passo-a-passo:

a)2/3 : 4/5 +1/2

$\frac{\frac{2}{3} }{\frac{4}{5} } +\frac{1}{2} \\\\\frac{2}{3} . \frac{5}{4} + \frac{1}{2}\\\\\frac{10}{12} +\frac{1}{2} \\\\\frac{10}{12} + \frac{6}{12}\\\\\frac{16}{12} \\\\\frac{4}{3}$

b)1/2 - 5/8 : 5/4​

$\frac{1}{2} - \frac{\frac{5}{8}}{\frac{5}{4}} \\\\\frac{1}{2} - \frac{5}{8} . \frac{4}{5} \\\\\frac{1}{2} - \frac{20}{40}\\\\\frac{20}{40} - \frac{20}{40}\\\\0$