Question

3ª) - Calcule o valor da expressão (1/2 - 1/3) - (1/6 - 1/10)?

A) 5/10
B) 8/10
C) 3/10
D) 2/10
E) 1/10

Answer 1

Resposta:

$(\frac{1}{2}-\frac{1}{3})-(\frac{1}{6}-\frac{1}{10})\\\\=\frac{1}{6}-\left(\frac{1}{6}-\frac{1}{10}\right)\\\\=\frac{1}{6}-\frac{1}{15}\\\\=\frac{1}{10}\\\\E) =\frac{1}{10}$