[tex] \frac{3}{8} . \frac{8}{3} = 1[/tex]
■ = 8/3
[tex] \frac{3}{8} + ( - \frac{3}{8} ) = 0[/tex]
★ = -3/8
[tex] \frac{8}{3} = - \frac{3}{8} = \frac{8}{3} \div - \frac{3}{8} [/tex]
[tex] = \frac{8}{3} . - \frac{8}{3} = \frac{ - 64}{9} [/tex]
