Multiply:
(i) $\frac{7}{11}\mathrm{by}\frac{3}{5}$
(ii) $\frac{3}{5}\mathrm{by}25$
(iii) $3\frac{4}{15}\mathrm{by}24$
(iv) $3\frac{1}{8}\mathrm{by}\times 4\frac{10}{14}$

Q. Multiply:
(i) $\frac{7}{11}\mathrm{by}\frac{5}{4}$
(ii) $\frac{5}{7}\mathrm{by}\frac{-3}{4}$
(iii) $\frac{-2}{9}\mathrm{by}\frac{5}{11}$
(iv) $\frac{-3}{17}\mathrm{by}\frac{-5}{-4}$
(v) $\frac{9}{-7}\mathrm{by}\frac{36}{-11}$
(vi) $\frac{-11}{13}\mathrm{by}\frac{-21}{7}$
(vii) $-\frac{3}{5}\mathrm{by}-\frac{4}{7}$
(viii) $-\frac{15}{11}\mathrm{by}7$

Q. Multiply:
(i) $\frac{7}{11}\mathrm{by}\frac{5}{4}$
(ii) $\frac{5}{7}\mathrm{by}\left(\frac{-3}{4}\right)$
(iii) $\frac{(-2)}{9}\mathrm{by}\frac{5}{11}$
(iv) $\frac{-3}{17}\mathrm{by}\frac{-5}{-4}$

Q. Multiply:

(i) $\frac{3}{4}\mathrm{by}\frac{5}{7}$
(ii) $\frac{9}{8}\mathrm{by}\frac{32}{3}$
(iii) $\frac{7}{6}\mathrm{by}24$
(iv) $\frac{-2}{3}\mathrm{by}\frac{6}{7}$
(v) $\frac{-12}{5}\mathrm{by}\frac{10}{-3}$
(vi) $\frac{25}{-9}\mathrm{by}\frac{3}{-10}$
(vii) $\frac{-7}{10}\mathrm{by}\frac{-40}{21}$
(viii) $\frac{-36}{5}\mathrm{by}\frac{20}{-3}$
(ix) $\frac{-13}{15}\mathrm{by}\frac{-25}{26}$

Q. Multiply:
(i) $\frac{-5}{17}\mathrm{by}\frac{51}{-60}$
(ii) $\frac{-6}{11}\mathrm{by}\frac{-55}{36}$
(iii) $\frac{-8}{25}\mathrm{by}\frac{-5}{16}$
(iv) $\frac{6}{7}\mathrm{by}\frac{-49}{36}$

Q. Multiply:

(i) 16 by 9
(ii) 18 by − 6
(iii) 36 by − 11
(iv) − 28 by 14
(v) − 53 by 18
(vi) − 35 by 0
(vii) 0 by − 23
(viii) − 16 by − 12
(ix) − 105 by − 8
(x) − 36 by − 50
(xi) − 28 by − 1
(xii) 25 by − 11