resolver
[tex]a) \frac{1}{5} - (1 - \frac{3}{10} )+ \frac{1}{2} = b) - \frac{3}{4} - ( \frac{3}{8} + \frac{5}{6} - \frac{11}{12} = c) \frac{2}{9} - ( \frac{2}{3} + \frac{1}{6} ) - \frac{4}{3} = [/tex]
ayudaaa porfaaaaa
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