Question

6 , и 5 умоляю пж с об'яснением​

Answer 1

Ответ:

#5.

$\frac{4}{5} + \frac{7}{10} - \frac{5}{12}$ = $\frac{4 * 12 + 7 * 6 - 5 * 5}{60} = \frac{48+42-25}{60} = \frac{65}{60} = 1\frac{5}{60} = 1\frac{1}{12}$

$\frac{9}{10} - (\frac{3}{4} - \frac{3}{5} ) + \frac{5}{8} = \frac{9}{10} - ( \frac{3*5 - 3*4}{20} ) + \frac{5}{8} = \frac{9}{10} - \frac{15-12}{20} + \frac{5}{8} = \frac{9*20 - 3 * 10 + 5 * 25}{200} = \frac{180-30+125}{200} = \frac{275}{200} = 1\frac{75}{200} = 1\frac{15}{40} = 1\frac{5}{8}$