5)1- 5 4 12 9 ; 8/2 4 )6(45) + (15) وَ(

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1. 5) \(1 - \frac{5}{12} : \frac{4}{9} = 1 - \frac{5}{12} \cdot \frac{9}{4} = 1 - \frac{5 \cdot 3}{4 \cdot 4} = 1 - \frac{15}{16} = \frac{16}{16} - \frac{15}{16} = \frac{1}{16}\)
2. 6) \(\frac{8}{9} : (\frac{2}{15} + \frac{4}{45}) = \frac{8}{9} : (\frac{2 \cdot 3}{15 \cdot 3} + \frac{4}{45}) = \frac{8}{9} : (\frac{6}{45} + \frac{4}{45}) = \frac{8}{9} : \frac{10}{45} = \frac{8}{9} \cdot \frac{45}{10} = \frac{8 \cdot 5}{1 \cdot 10} = \frac{4 \cdot 1}{1 \cdot 1} = 4\)

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