Question

Решите пример 5-9 классы​

Answer 1

Ответ:

$18*(\frac{1}{9})^{2} -20*\frac{1}{9} =-2$

$1)(\frac{1}{9})^{2} =\frac{1}{9}*\frac{1}{9}=\frac{1}{81}$

$2)18*\frac{1}{81}=\frac{18}{81}=\frac{2}{9}$

$3)20*\frac{1}{9} =\frac{20}{9} =2\frac{2}{9}$

$4)\frac{2}{9} -2\frac{2}{9} =-2\frac{2}{9} +\frac{2}{9} =-2$