Question

Решить примеры
а)1/2+2/3+3/4
б)7/8+1/6-2/3
в)9/10-3/5+5/7
г)5/24-1/60-1/40

Answer 1

$\frac{1}{2} + \frac{2}{3} + \frac{3}{4} = \frac{6 + 8 + 9}{12} = \frac{23}{12} \\ \\ \frac{7}{8} + \frac{1}{6} - \frac{2}{3} = \frac{21 + 4 - 16}{24} = \frac{9}{24} = \frac{3}{8} \\ \\ \frac{9}{10} - \frac{3}{5} + \frac{5}{7} = \frac{63 - 42 + 50}{70} = \frac{71}{70} \\ \\ \frac{5}{24} - \frac{1}{60} - \frac{1}{40} = \frac{25 - 2 - 3}{120} = \frac{20}{120} = \frac{1}{6}$