Question

6 , и 5 умоляю пж с об'яснением​

Answer 1

Ответ:

#5.

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

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