Question

Efetue os cálculos algébricos a seguir A) -7/5 + 5/7= B)7,75-8= C) 12,75+19,45= D)21,05-33=

Answer 1

a)

$- \frac{7}{5} + \frac{5}{7} \\ - \frac{49 + 25}{35} = - \frac{24}{35}$

b) -0,25

c) 32,2

d) -11,95