a).
[tex]( - \frac {1}{2}) + ( - \frac{27}{4} ) \\ \\ - \frac{1}{2} - \frac{27}{4} \\ \\ - \frac{29}{4} [/tex]
b).
[tex] \frac{4}{5} + \frac{9}{5} \\ \\ \frac{4 + 9}{5 } \\ \\ \frac{13}{5} [/tex]
c).
[tex]( - \frac{1}{4} ) + \frac{7}{4} \\ \\ - \frac{1}{4} + \frac{7}{4} \\ \\ \frac{3}{2} [/tex]
d).
[tex] \frac{3}{9} + ( - \frac{7}{9} ) \\ \\ \frac{3}{9} - \frac{7}{9} \\ \\ - \frac{4}{9} [/tex]
Espero haberte ayudado :3
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a).
[tex]( - \frac {1}{2}) + ( - \frac{27}{4} ) \\ \\ - \frac{1}{2} - \frac{27}{4} \\ \\ - \frac{29}{4} [/tex]
b).
[tex] \frac{4}{5} + \frac{9}{5} \\ \\ \frac{4 + 9}{5 } \\ \\ \frac{13}{5} [/tex]
c).
[tex]( - \frac{1}{4} ) + \frac{7}{4} \\ \\ - \frac{1}{4} + \frac{7}{4} \\ \\ \frac{3}{2} [/tex]
d).
[tex] \frac{3}{9} + ( - \frac{7}{9} ) \\ \\ \frac{3}{9} - \frac{7}{9} \\ \\ - \frac{4}{9} [/tex]
Espero haberte ayudado :3