1.
[tex]3 \frac{1}{8} \div ( - 6 \frac{3}{8} ) = \frac{25}{8} \times ( - \frac{8}{51}) = - \frac{25}{51} [/tex]
2.
[tex]2.4 \div ( - 0.8) = - 3[/tex]
3.
[tex] \frac{3}{7} \times ( - 4) = - \frac{12}{7} = - 1 \frac{5}{7} [/tex]
4.
[tex] - \frac{1}{4} \times ( - \frac{1}{4}) \times ( - \frac{1}{4}) = {( - \frac{1}{4}) }^{3} = - \frac{1}{64} [/tex]
5.
[tex] - 1.6 \times ( - 0.3) = 0.48[/tex]
6.
[tex] - 7 + 8 \div ( - 2) - 3 \times ( - 5) = - 7 - 4 + 15 = - 11 + 15 = 4[/tex]
