Question

4/7+2/5=
7/12-5/9=
9/16-3/8=
3 4/9-2 1/6
2 3/4+3 2/5
5-3 14/17

Answer 1

Пошаговое объяснение:

$\frac{4}{7} + \frac{2}{5} = \frac{20 + 14}{35} = \frac{34}{35}$

$\frac{7}{12} - \frac{5}{9} = \frac{21 - 20}{36} = \frac{1}{36}$

$\frac{9}{16} - \frac{3}{8} = \frac{9 - 6}{16} = \frac{3}{16}$

$3 \frac{4}{9} - 2 \frac{1}{6} =(3 - 2) + ( \frac{8 - 3}{18} ) = 1 \frac{5}{18}$

$2 \frac{3}{4} + 3 \frac{2}{5} = (2 + 3) + \frac{15 + 8}{20} = 5 \frac{23}{20} = 6 \frac{3}{20}$