[tex] \frac{8}{7} \: - \: \frac{1}{3} [/tex]
[tex] \frac{24 \: - \: 7}{21} [/tex]
[tex] \boxed{ \bold{ \frac{17}{21} }}[/tex]
[tex] \frac{9}{5} \: - \: \frac{2}{5} [/tex]
[tex] \frac{9}{5} \: - \: \frac{1}{2} [/tex]
[tex] \frac{18 \: - \: 5}{10} [/tex]
[tex] \boxed{ \bold{ \frac{13}{10} }}[/tex]
[tex] \frac{2}{4} \: \times \: \frac{6}{8} \: \times \: \frac{4}{3} \: = \: \frac{1}{2} \times \: \frac{3 \: }{4} \: \times \: \frac{4}{3} \: = \: \boxed{ \: \bold{ \frac{1}{2} }}[/tex]
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A. 8/7 - 1/3
[tex] \frac{8}{7} \: - \: \frac{1}{3} [/tex]
[tex] \frac{24 \: - \: 7}{21} [/tex]
[tex] \boxed{ \bold{ \frac{17}{21} }}[/tex]
B. 9/5 - 2/4
[tex] \frac{9}{5} \: - \: \frac{2}{5} [/tex]
[tex] \frac{9}{5} \: - \: \frac{1}{2} [/tex]
[tex] \frac{18 \: - \: 5}{10} [/tex]
[tex] \boxed{ \bold{ \frac{13}{10} }}[/tex]
El último problema:
[tex] \frac{2}{4} \: \times \: \frac{6}{8} \: \times \: \frac{4}{3} \: = \: \frac{1}{2} \times \: \frac{3 \: }{4} \: \times \: \frac{4}{3} \: = \: \boxed{ \: \bold{ \frac{1}{2} }}[/tex]