851. Выполните вычитание: а) 3/5 − 1/5; б) 7/20 − 3/20; в) 12/16 − 3/16; г) 16/27 − 8/27.

1. \(\dfrac{3}{5}-\dfrac{1}{5}=\dfrac{3-1}{5}=\dfrac{2}{5}\).
2. \(\dfrac{7}{20}-\dfrac{3}{20}=\dfrac{4}{20}=\dfrac{1}{5}\).
3. \(\dfrac{12}{16}-\dfrac{3}{16}=\dfrac{9}{16}\).
4. \(\dfrac{16}{27}-\dfrac{8}{27}=\dfrac{8}{27}\).

Ответ: а) \(\dfrac{2}{5}\); б) \(\dfrac{1}{5}\); в) \(\dfrac{9}{16}\); г) \(\dfrac{8}{27}\).