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(3 supra 8 + 3 supra 4) * 32 supra 18 + 3 supra 4
5 supra 9 : 25 supra 36

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[tex]( \frac{3}{8} + \frac{3}{4} ) \times \frac{32}{18} + \frac{3}{4} = \frac{3 + 6}{8} \times \frac{32}{18} + \frac{3}{4} = \frac{9}{8} \times \frac{32}{18} + \frac{3}{4} = \frac{9 \times 32}{8 \times 18} + \frac{3}{4} = \frac{288}{144} + \frac{3}{4} = \frac{288 + 108}{144} = \frac{396}{144} = \frac{198}{72} = \frac{99}{36} = \frac{33}{12} = \frac{11}{4} [/tex]

[tex] \frac{5}{9} \div \frac{25}{36} = \frac{5}{9} \times \frac{36}{25} = \frac{5 \times 36}{9 \times 25} = \frac{180}{225} = \frac{36}{45} = \frac{4}{5}[/tex]

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