Question

1\3 mais 2\4
9\10 mais 7\20
11\18 mais 5\20
4\21 mais 1\14
me ajudem

Answer 1

Resposta:

$\frac{1}{3} + \frac{2}{4} = \frac{4}{12} + \frac{6}{12} = \frac{10}{12} \\\\\\\frac{9}{10} + \frac{7}{20} = \frac{90}{20} + \frac{70}{20} = \frac{160}{20} \\\\\\\frac{11}{18} + \frac{5}{20} = \frac{110}{180} + \frac{45}{180} = \frac{155}{180} \\\\\\\frac{4}{21} +\frac{1}{14} = \frac{8}{42} + \frac{3}{42} = \frac{11}{42}$