Verified answer

а)

[tex]6 - 4 \frac{2}{3} =6 - \frac{14}{3} = \frac{18}{3} - \frac{14}{3} = \frac{4}{3} [/tex]

обратное

[tex] \frac{3}{4} [/tex]

б)

[tex]2 + 1 \frac{1}{2} = 2 + \frac{3}{2} = \frac{4}{2} + \frac{3}{2} = \frac{7}{2} [/tex]

обратное

[tex] \frac{2}{7} [/tex]

в)

[tex] \frac{11}{14} \times \frac{42}{55} = \frac{11 \times 42}{14 \times 55} = \frac{6}{2 \times 5} = \frac{6}{10} = \frac{3}{5} [/tex]

обратное

[tex] \frac{5}{ 3} = 1 \frac{2}{3} [/tex]

г)

[tex]4 \frac{1}{2} - 2 \frac{1}{3} = \frac{9}{2} - \frac{7}{3} = \frac{27}{6} - \frac{14}{6} = \frac{13}{6} [/tex]

обратное

[tex] \frac{6}{13} [/tex]