Вычислите.
1) $1 - \frac{13}{21} = \frac{}{21} - \frac{13}{21} = $
2) $4 - \frac{2}{9} = 3\frac{}{9} - \frac{2}{9} = $
3) $7 - 1\frac{13}{16} = $
4) $10 - 5\frac{3}{7} = $
$1 - \frac{13}{21} = \frac{21}{21} - \frac{13}{21} = \frac{8}{21}$
$4 - \frac{2}{9} = 3\frac{9}{9} - \frac{2}{9} = 3\frac{7}{9}$
$7 - 1\frac{13}{16} = 6\frac{16}{16} - 1\frac{13}{16} = 5\frac{3}{16}$
$10 - 5\frac{3}{7} = 9\frac{7}{7} - 5\frac{3}{7} = 4\frac{4}{7}$
Пожауйста, оцените решение
