-8.3-(-2 \frac{4}{15} ) = - 8 \frac{3}{10} + 2 \frac{4}{15} = \\ = - 6 \frac{9 - 8}{30} = - 6 \frac{1}{30} " alt="-8.3-6 \frac{1}{3} = - (8 \frac{3}{10} + 6 \frac{1}{3}) = \\ = - (14 \frac{9 +10 }{30} ) = - 14 \frac{19 }{30} \\ \\
-8.3-(-2 \frac{4}{15} ) = - 8 \frac{3}{10} + 2 \frac{4}{15} = \\ = - 6 \frac{9 - 8}{30} = - 6 \frac{1}{30} " align="absmiddle" class="latex-formula">