Question

1-2/7=?
6-2 1/3=?

с объяснением

Answer 1

$1 - \frac{2}{7} = \frac{7}{7} - \frac{2}{7} = \frac{7 - 2}{7} = \frac{5}{7} \\ \\ 6 - 2 \frac{1}{3} = 6 - \frac{ 2\times 3 + 1}{3} = 6 - \frac{7}{3} = \frac{18}{3} - \frac{7}{3} = \frac{11}{3} = 3 \frac{2}{3}$

Answer 2

1-2/7=7/7-2/7=(7-2)/7=5/7

6-2 1/3=5+1-2-1/3=5-2+3/3-1/3=3+(3-1)/3=3+2/3=3 2/3