Question

A)x + y ( para x = ½ e y = -1/5)



B)a –b ( para a = 3 e b = -1/2)
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Answer 1

A) $\frac{1}{2} - \frac{1}{5} = \frac{5 - 2}{10} = \frac{3}{10}$   B) $3 + \frac{1}{2} = \frac{6 + 1}{2} = \frac{7}{2} = 3,5$