Question

помогите пожалуйста срочно!!!​

Answer 1

Ответ:

1)

$\frac{5}{7} - \frac{2}{7} = \frac{5 - 2}{7} = \frac{3}{7}$

2)

$6 \frac{11}{13} = \frac{6 \times 13 + 11}{13} = \frac{89}{1 3}$

3)

$2 \frac{1}{6} - 1 \frac{5}{6} + 3 \frac{2}{6} - 2 \frac{5}{6} = \frac{13}{6} - \frac{11}{6} + \frac{20}{6} - \frac{17}{6} = \frac{13 - 11 + 20 - 17}{6} = \frac{5}{6}$

4)

$\frac{2}{11} - x + \frac{4}{11} = \frac{4}{11} \\ \frac{2}{11} + \frac{4}{11} - x = \frac{4}{11} \\ \frac{6}{11} - x = \frac{4}{11} \\ x = \frac{6}{11} - \frac{4}{11} \\ x = \frac{2}{11}$

5)

$3 \frac{2}{9} - 2 \frac{1}{9} + x = 4 \frac{5}{9} \\ \frac{29}{9} - \frac{19}{9} + x = \frac{41}{9} \\ \frac{10}{9} + x = \frac{41}{9} \\ x = \frac{41}{9} - \frac{10}{9} \\ x = \frac{31}{9} \\ x = 3 \frac{4}{9}$