Respuesta:[tex]a) \frac{1}{6} + \frac{2}{5} = \frac{-21}{20} \\b)\frac{12}{7} + \frac{8}{9}= \frac{164}{63}\\c) -\frac{19}{20} + (-\frac{3}{5}) \frac{1}{2} = -\frac{21}{20} \\d) \frac{21}{55}+(-\frac{12}{5})+\frac{4}{3} = -\frac{113}{165} \\e) \frac{7}{2} +\frac{12}{7} +(-\frac{1}{4})= \frac{139}{28}[/tex]
Explicación paso a paso:
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Respuesta:[tex]a) \frac{1}{6} + \frac{2}{5} = \frac{-21}{20} \\b)\frac{12}{7} + \frac{8}{9}= \frac{164}{63}\\c) -\frac{19}{20} + (-\frac{3}{5}) \frac{1}{2} = -\frac{21}{20} \\d) \frac{21}{55}+(-\frac{12}{5})+\frac{4}{3} = -\frac{113}{165} \\e) \frac{7}{2} +\frac{12}{7} +(-\frac{1}{4})= \frac{139}{28}[/tex]
Explicación paso a paso: