Заполни таблицу

а)

\(b\)	\(c\)	\(b + c\)
\(\dfrac{1}{10}\)	\(\dfrac{2}{5}\)	[ ]
\(\dfrac{1}{3}\)	[ ]	\(\dfrac{1}{2}\)
[ ]	\(\dfrac{1}{5}\)	\(\dfrac{1}{4}\)

б)

\(b\)	\(c\)	\(b - c\)
\(\dfrac{1}{2}\)	\(\dfrac{1}{7}\)	[ ]
\(\dfrac{5}{8}\)	[ ]	\(\dfrac{1}{4}\)
[ ]	\(\dfrac{1}{5}\)	\(\dfrac{1}{2}\)