Question

Помогите пж! Даю 50 балов. ​

Answer 1

5.

$\frac{2}{3} \times 45 = 30$

6.

$\frac{2}{9} \times 18 = 4$

7

$\frac{11}{400} =0 .0275$

8

$\frac{7}{12} \times \frac{6}{11} + \frac{5}{12} \times \frac{6}{11} = \\ \frac{6}{11} ( \frac{7}{12} + \frac{5}{12} ) = \\ \frac{6}{11} \times 1 = \frac{6}{11}$

9. 4 верно

$x \times \frac{1}{x} = 1$