Question

11/20 - 5/12
8/9 + 7/54
5/6 - 17/21
3/16 + 1/24
5/6 - 22/27​

Answer 1

Ответ:

$\frac{11}{20} - \frac{5}{12} = \frac{11 \times 3}{20 \times 3} - \frac{5 \times 5}{12 \times 5} = \frac{33}{60 } - \frac{25}{60} = \frac{8}{60} = \frac{2}{15}$

Пошаговое объяснение:

$\frac{8}{9} + \frac{7}{54} = \frac{8 \times 6}{9 \times 6} + \frac{7}{54} = \frac{48}{54} + \frac{7}{54} = \frac{55}{54} = 1\frac{1}{54}$

$\frac{5}{6} - \frac{17}{21} = \frac{5 \times 7}{6 \times 7} - \frac{17 \times 2}{21 \times 2} = \frac{35}{42} - \frac{34}{42} = \frac{1}{42}$

$\frac{3}{16} + \frac{1}{24} = \frac{3 \times 3}{16 \times 3} + \frac{1 \times 2}{24 \times 2} = \frac{9}{48} + \frac{2}{48} = \frac{11}{48}$

$\frac{5}{6} - \frac{22}{27} = \frac{5 \times 9}{6 \times 9} - \frac{22 \times 2}{27 \times 2} = \frac{45}{54} - \frac{44}{54} = \frac{1}{54}$