Răspuns:
Explicație pas cu pas:
[tex]a) \frac{2}{5} + \frac{4}{1} (\frac{7}{2} - \frac{2}{5} )=\frac{2}{5} + \frac{4}{1} \frac{31}{10}= \frac{2}{5}+\frac{62}{5}=\frac{64}{5}=12,8\\\\b) \frac{12}{5} + 1 =\frac{17}{5}=3,4\\\\c) \frac{7}{5}+\frac{81}{2}= \frac{419}{10}=41,9\\\\d) 1,44 + 3 x 4 x0,5= 1,44 + 6= 7,44[/tex]
