[tex]( + \frac{2}{5} ) + ( - \frac{1}{3} ) = [/tex]
[tex]( - \frac{2}{3} ) + ( - \frac{5}{6} ) = [/tex]

[tex]( + \frac{3}{5} ) + ( - \frac{1}{3}) + ( - \frac{2}{5} ) = [/tex]
[tex] ( + 0.1) + ( - 1.1) + ( + 0.11) = [/tex]
me ajudem por favor

​