Respostas

  • Usuário do Brainly
2014-08-06T17:36:52-03:00
A)
   \frac{2}{5} + \frac{3}{10} = \frac{4+3}{10} = \frac{7}{10}

b)
   \frac{2}{3}+ \frac{7}{6}  = \frac{4+7}{6} = \frac{11}{6}

c)
    \frac{2}{9} + \frac{3}{4} = \frac{8+27}{36} = \frac{35}{36}

d)
   \frac{7}{2} + \frac{4}{5} = \frac{35+8}{10} = \frac{43}{10}
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