Question

Помогите пожалуйста ​

Answer 1

Ответ:

1)

$- \frac{7}{2}$

2)

$0$

3)

$- \frac{8}{3}$

4)

$- \frac{55}{7}$

5)

$- \frac{17}{6}$

6)

$\frac{43}{12}$

Пошаговое объяснение:

1)

$\frac{1}{2} - ( + 4) = \frac{1}{2} - 4 = \\ = \frac{1}{2} - \frac{4}{1} = \frac{1 \times 1 - 4 \times 2}{2 \times 1} = \\ = \frac{1 - 8}{2} = - \frac{7}{2}$

2)

$- \frac{5}{11} - ( - \frac{5}{11} ) = - \frac{5}{11} + \\ + \frac{5}{11} = 0$

3)

$- 5 - ( - 2 \frac{1}{3} ) = - 5 + 2 \frac{1}{3} = \\ = 2 \frac{1}{3} - 5 = \frac{7}{3} - \frac{5}{1} = \\ = \frac{7 \times 1 - 5 \times 3}{3 \times 1} = \\ = \frac{7 - 15}{3} = - \frac{8}{3}$

4)

$- 8 - ( - \frac{1}{7} ) = - 8 + \frac{1}{7} = \\ = \frac{1}{7} - 8 = \\ = \frac{1}{7} - \frac{8}{1} = \\ = \frac{1 \times 1 - 8 \times 7}{7 \times 1} = \\ = \frac{1 - 56}{7} = - \frac{55}{7}$

5)

$\frac{1}{6} - ( + 3) = \frac{1}{6} - 3 = \\ = \frac{1}{6} - \frac{3}{1} = \\ = \frac{1 \times 1 - 3 \times 6}{6 \times 1} = \\ = \frac{1 - 18}{6} = - \frac{17}{6}$

6)

$- \frac{5}{12} - ( - 4) = - \frac{5}{12} + 4 = \\ = 4 - \frac{5}{12} = \frac{4}{1} - \frac{5}{12} = \\ = \frac{4 \times 12 - 5 \times 1}{1 \times 12} = \\ = \frac{48 - 5}{12} = \frac{43}{12}$