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Jawab:
Nomor 8:
[tex]( + \frac{2}{3}) \times ( - \frac{9}{2} ) \\ = - ( \frac{2}{3} \times \frac{9}{2} ) \\ = - ( \frac{2 \times 9}{3 \times 2} ) \\ = - \frac{18}{6} \\ = - \frac{18 \div 6}{6 \div 6} = - \frac{3}{1} = - 3[/tex]
Nomor 9:
[tex]( - 2.5) \times ( - \frac{4}{3} ) \\ = ( - \frac{25}{10} ) \times ( - \frac{4}{3} ) \\ = \frac{25}{10} \times \frac{4}{3} \\ = \frac{100}{30} \\ = \frac{100 \div 10}{30 \div 10} = \frac{10}{3} = 3 \frac{1}{3} [/tex]
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