Question

Решить номера обозначенные красным цветом

Answer 1

2.

$\frac{4}{15} \times ( - \frac{5}{8} ) = \frac{1}{3} \times ( - \frac{1}{2} ) = - \frac{1}{6}$

3.

$- \frac{5}{9} \times ( - \frac{12}{25} ) = - \frac{1}{3} \times ( - \frac{4}{5} ) = \frac{4}{15}$

4.

$- 3 \frac{1}{2} \times ( - \frac{4}{7} ) = - \frac{7}{2} \times ( - \frac{4}{7} ) = 2$

11.

$( { - 2})^{3} = - (2 \times 2 \times 2) = - 8$

12.

$( - \frac{2}{5} ) ^{2} = ( - \frac{ {2}^{2} }{ {5}^{2} } ) = - \frac{4}{25}$

14.

$- \frac{5}{6} \times ( - 1) ^{2} = - \frac{5}{6} \times 1 = - \frac{5}{6}$

21.

$\frac{4}{15} \div ( - \frac{8}{25} ) = \frac{4}{15} \times ( - \frac{25}{8}) = \frac{1}{3} \times ( - \frac{5}{4} ) = - \frac{5}{12}$

22.

$- \frac{2}{3} \div ( - 8) = \frac{2}{3 \times 8} = \frac{1}{3 \times 4} = \frac{1}{12}$

23.

$- 5 \div \frac{5}{7} = - 5 \times \frac{7}{5} = - \frac{5 \times 7}{5} = 7$

30.

0 × ( – 9, 54) = 0

31.

тут тоже сразу ноль

32.

– 15,7 : (– 15,7) = 1