$\frac{1}{14}+\frac{5}{14}=\frac{1+5}{14}=\frac{6}{14}\backslash frac\{1\}\{14\}+\backslash frac\{5\}\{14\}=\backslash frac\{1+5\}\{14\}=\backslash frac\{6\}\{14\}$

$\frac{6}{14}=\frac{6:2}{14:2}=\frac{3}{7}\backslash frac\{6\}\{14\}=\backslash frac\{6:2\}\{14:2\}=\backslash frac\{3\}\{7\}$

Respuesta: $\frac{3}{7}\backslash frac\{3\}\{7\}$

$\frac{17}{45}+\frac{18}{45}=\frac{17+18}{45}=\frac{35}{45}\backslash frac\{17\}\{45\}+\backslash frac\{18\}\{45\}=\backslash frac\{17+18\}\{45\}=\backslash frac\{35\}\{45\}$

$\frac{35}{45}=\frac{35:5}{45:5}=\frac{7}{9}\backslash frac\{35\}\{45\}=\backslash frac\{35:5\}\{45:5\}=\backslash frac\{7\}\{9\}$

Respuesta: $\frac{7}{9}\backslash frac\{7\}\{9\}$

$\frac{17}{35}-\frac{12}{35}=\frac{17-12}{35}=\frac{5}{35}\backslash frac\{17\}\{35\}-\backslash frac\{12\}\{35\}=\backslash frac\{17-12\}\{35\}=\backslash frac\{5\}\{35\}$

$\frac{5}{35}=\frac{5:5}{35:5}=\frac{1}{7}\backslash frac\{5\}\{35\}=\backslash frac\{5:5\}\{35:5\}=\backslash frac\{1\}\{7\}$

Respuesta: $\frac{1}{7}\backslash frac\{1\}\{7\}$

$\frac{9}{10}-\frac{6}{10}=\frac{9-6}{10}=\frac{3}{10}\backslash frac\{9\}\{10\}-\backslash frac\{6\}\{10\}=\backslash frac\{9-6\}\{10\}=\backslash frac\{3\}\{10\}$

Respuesta: $\frac{3}{10}\backslash frac\{3\}\{10\}$