Заполни пропуски

1. \(\dfrac{21}{252} = \) [ ].

2. \(\dfrac{36}{279} = \) [ ].

3. \(\dfrac{54}{81} = \) [ ].

4. \(\dfrac{48}{168} = \) [ ].

5. \(\dfrac{24}{288} = \dfrac{x}{12} \) ;

   \(x =\) [ ].

6. \(\dfrac{54}{126} = \dfrac{3}{x} \) ;

   \(x =\) [ ].

7. \(\dfrac{42}{294} = \dfrac{3}{x} \) ;

   \(x =\) [ ].

8. \(\dfrac{121}{286} = \dfrac{11}{x} \) ;

   \(x =\) [ ].