Question

Вычислите:
пж...оч надооо

Answer 1

Решение на фотографии

Answer 2

Неправильно.

Answer 3

$6 + 2 frac{4}{7} = frac{6}{1} + frac{18}{7} = frac{42}{7} + frac{18}{7} = frac{42 + 18}{7} = frac{60}{7}$

$6 - 2 frac{4}{7} = frac{6}{1} - frac{18}{7} = frac{42}{7} - frac{18}{7} = frac{24}{7}$

$2 frac{4}{7} - 6 = frac{18}{7} - frac{6}{1} = frac{18}{7} - frac{42}{7} = frac{18 - 42}{7} = - frac{24}{7}$

$- 2 frac{4}{7} - 6 = - frac{18}{7} - frac{6}{1} = - frac{18}{7} - frac{42}{7} = frac{ - 18 - 42}{7} = frac{ - 60}{7} = - frac{60}{7}$
$- 2 frac{4}{7} = 6 \ - frac{18}{7} = 6$
- 2,57 ≠ 6

$- 6 + 2 frac{4}{7} = - frac{6}{1} + frac{18}{7} = - frac{42}{7} + frac{18}{7} = - frac{42 + 18}{7} = - frac{24}{7}$