Question

Решить пример с дробями 1-2/7=

Answer 1

$1-frac{2}{7} \frac{7-2}{7} \frac{5}{7}$

Answer 2

$ttdisplaystyle 1 - frac {2}{7} = frac {7}{7} - frac {2}{7} = frac {5}{7}$

или

$ttdisplaystyle frac{1-2}{7} = frac{1}{7}$