Question

Решение и объяснение​

Answer 1

Ответ:

$13\frac{7}{9} - (2,64 + 2\frac{7}{9}) = 8 \frac{9}{25}$

$1) 2,64+2\frac{7}{9} = 2\frac{64}{100} +2\frac{7}{9} = \frac{264}{100} +\frac{25}{9}= \frac{66}{25} +\frac{25}{9} = \frac{594}{225}+ \frac{625}{225} = \frac{594+225}{225}=\frac{1219}{225} = \\\\5\frac{94}{225}$

$2) 13\frac{7}{9} - 5\frac{94}{225} = \frac{124}{9} - \frac{1219}{225} = \frac{3100}{225} - \frac{1219}{225} = \frac{3100-1219}{225} = \frac{1881}{225} = \frac{209}{25} = 8\frac{9}{25}$