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Ответ:

а)

[tex] 3\frac{4}{7} + 2\frac{3}{5} = \frac{25}{7} + \frac{13}{5} = \frac{125 + 91}{35} = 6 \frac{6}{35} [/tex]

б)

[tex]6 \frac{5}{6} + 2 \frac{3}{8} = \frac{41}{6} + \frac{19}{8} = \frac{164 + 57}{24} = 9 \frac{5}{24} [/tex]

д)

[tex]5 \frac{4}{9} + 2 \frac{5}{12} = \frac{49}{9} + \frac{29}{12} = \frac{196 + 87}{36} = 7 \frac{31}{36} [/tex]

е)

[tex]8 \frac{1}{8} - 4 \frac{7}{10} = \frac{65}{8} - \frac{47}{10} = \frac{325 - 188}{40} = \frac{137}{40} = 3 \frac{17}{40} [/tex]