Вычислите 1 целая 4/5 - 9/10 7/24+5/24 17/18-5/18 Помогите спать хочу :D

1)[latex]1 \frac{4}{5} - \frac{9}{10} = \frac{1*5+4}{5} - \frac{1}{9} = \frac{9}{5} - \frac{9}{10} [/latex] [latex] \frac{9*2}{5*2} - \frac{9}{10} = \frac{18}{10} - \frac{9}{10} = \frac{18-9}{10} = \frac{9}{10} [/latex] 2) [latex] \frac{7}{24} + \frac{5}{24} = \frac{7+5}{24} = \frac{12}{24} = \frac{1}{2} [/latex] 3)[latex] \frac{17}{18} - \frac{5}{18} = \frac{17-5}{18} = \frac{12}{18} = \frac{2}{3} [/latex]