Verified answer

[tex]7 \frac{1}{3} \times 2 \frac{1}{2} + \frac{1}{2} \times 7 \frac{1}{3} = 7 \frac{1}{3} (2 \frac{1}{2} + \frac{1}{2} ) = 7 \frac{1}{3} \times 3 = \frac{22}{3} \times 3 = 22 [/tex]

обратное число

[tex] \frac{1}{22} [/tex]