Question

буду благодарен если вы сделаете прямо сейчас​

Answer 1

Ответ:

12)

$\frac{1}{3} + \frac{1}{6} = \frac{1}{2} \\ \frac{3}{11} - \frac{1}{13} = \frac{28}{143} \\ 3\frac{1}{30} - 5 \frac{7}{90} = - \frac{92}{45} = - 2 \frac{2}{45}$

13)

$8.31 - (4.29 + 3.721) = 0.299$

14)

$\frac{7}{16} \times \frac{8}{21} = \frac{1}{6} \\ ( - 3 \frac{1}{4} ) \times ( - 3 \frac{9}{13} ) = 12 \\ - 3 \frac{1}{7} \times 1 \frac{3}{11} = \frac{6}{7}$

15)

$\frac{5}{7} \div ( - \frac{10}{21} ) = - \frac{3}{2} = - 1 \frac{1}{2} \\ - 14 \div ( - 2 \frac{4}{5} ) = 5 \\ - \frac{4}{5} \div 9 = - \frac{4}{45}$

16)

${11}^{2} = 121 \\ ( { - 5}^{3} ) = - 125 \\ ( - 1{ \frac{1}{5}) }^{2} = \frac{36}{25} = 1 \frac{11}{25}$