Question

a expressão (3/2-2/5)+(5/4-2/3)=

Answer 1

$(\frac{3}{2} - \frac{2}{5} )+( \frac{5}{4} - \frac{2}{3} )= \\ \\ =( \frac{5.3-2.2}{10} )+( \frac{5.3-4.2}{12} )= \\ \\ =( \frac{15-4}{10} )+( \frac{15-8}{12} )= \\ \\ =\frac{11}{10} + \frac{7}{12} = \frac{6.11+5.7}{60} = \frac{66+35}{60} = \frac{95}{60} = \frac{19}{12}$