Question

efectuar las siguientes sustracciones​

Answer 1

Explicación paso a paso:

$\frac{3}{5} -\frac{2}{7} =\frac{3.7}{5.7} -\frac{2.5}{y7.5} =\frac{11}{35} \\\\\frac{3}{5} -\frac{5}{21} =\frac{3.21}{5.21} -\frac{5.5}{21.5} =\frac{38}{105} \\\\3 -\frac{2}{7} =\frac{3.7}{1.7} -\frac{2}{7} =\frac{19}{7} \\\\3 -\frac{5}{21} =\frac{3.21}{1.21} -\frac{5}{21} =\frac{58}{21}$