[tex](( \frac{6}{90} - \frac{5}{90} ) \times \frac{45}{1} + \frac{1}{60} \div ( \frac{5}{60} - \frac{4}{60} )) \div \frac{3}{2} = \\ ( \frac{1}{90} \times \frac{45}{1} + \frac{1}{60} \div \frac{1}{60} ) \times \frac{2}{3} = \\ ( \frac{1}{2} + \frac{1}{60} \times \frac{60}{1} ) \times \frac{2}{3} = \\ ( \frac{1}{2} + 1) \times \frac{2}{3} = \\ ( \frac{1}{2} + \frac{2}{2} ) \times \frac{2}{3} = \\ \frac{3}{2} \times \frac{2}{3} = 1[/tex]
