[tex] 1)\frac{4}{5} \times \frac{1}{10} = \frac{2}{5} \times \frac{1}{5} = \frac{2}{25} [/tex]
[tex]2)0.36 \times \frac{3}{4} = \frac{36}{100} \times \frac{3}{4} = \frac{9}{25} \times \frac{3}{4} = \frac{27}{100} [/tex]
[tex]3)1 \frac{7}{8} \times 2.4 = 1 \frac{7}{8} \times \frac{24}{10} = \frac{15}{8} \times \frac{12}{5} = \frac{3}{2} \times 3 = \frac{9}{2} [/tex]
[tex]4) 3 \frac{1}{4} \times 3.6 = \frac{13}{4} \times \frac{18}{5} = \frac{16}{2} \times \frac{9}{5} = \frac{117}{10} [/tex]
[tex]5) \frac{2}{25} \times 3.7 = \frac{2}{25} \times \frac{37}{10} = \frac{1}{25} \times \frac{37}{5} = \frac{37}{125} [/tex]
[tex]6) \frac{13}{20} \times 1.2 = \frac{13}{20} \times \frac{6}{5} = \frac{13}{10} \times \frac{3}{5} = \frac{39}{50} [/tex]
[tex]7) \frac{3}{50} \times 1.8 = \frac{3}{50} \times \frac{9}{5} = \frac{27}{250} [/tex]
[tex]8)2 \frac{2}{5} \times 5.4 = \frac{11}{5} \times \frac{27}{5} = \frac{297}{25} [/tex]