Решите пж 6-5 1/7 равно 7-2 2/7 равно 4 5/7 - 6-7 равно 15-( 7 целых 2/9 + 4 целых 5/9)...

$6 - 5 \frac{1}{7} = \frac{6}{7}$
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$7 - 2 \frac{2}{7} = 4 \frac{5}{7}$
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$4 \frac{5}{7} - 6 - 7 = 4 \frac{5}{7} - 13 = - 8 \frac{2}{7}$
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$15 - (7 \frac{2}{9} + 4 \frac{5}{9} ) = \\ \\ = 15 - 11 \frac{7}{9} = 3 \frac{2}{9}$
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$4 \frac{5}{9} + 2 \frac{7}{9} = 6 \frac{12}{9} = 7 \frac{3}{9} = 7 \frac{1}{3}$

или
$4 \frac{5}{9} - 2 \frac{7}{9} = 3 \frac{14}{9} - 2 \frac{7}{9} = 1 \frac{7}{9}$