Question

Пж дам 20 балов пжадададажа

Answer 1

Ответ:

$2\frac{4}{7}-1\frac{3}{7}+3\frac{1}{7}-2\frac{5}{7}=\\\\\frac{18}{7}-\frac{10}{7}+\frac{22}{7}-\frac{19}{7}=\\\\\frac{18-10+22-19}{7} =\frac{11}{7} =1\frac{4}{7}$

Answer 2

$2\frac{4}{7} - 1\frac{3}{7} + 3\frac{1}{7} - 2\frac{5}{7} = \\\\1)2\frac{4}{7} - 1\frac{3}{7} = 1\frac{4-3}{7} = 1\frac{1}{7} \\\\2)3\frac{1}{7} - 2\frac{5}{7} = 1\frac{1-5}{7} = \frac{7+1-5}{7} = \frac{3}{7} \\\\3)1\frac{1}{7} + \frac{3}{7} = 1\frac{1+3}{7} = 1\frac{4}{7}$