Question

Помогите пожалуйста (

Answer 1

Ответ:

До 1:

$\frac{1}{15}$

1.

$\frac{12 \times 10}{25 \times 7}$

=

$\frac{12 \times 2}{5 \times 7}$

=

$\frac{24}{35}$

2.

$\frac{14 \times 3}{5 \times 28}$

=

$\frac{3}{5 \times 2}$

=

$\frac{3}{10}$

3.

$\frac{14 \times 10}{15 \times 21}$

=

$\frac{14 \times 2}{3 \times 21}$

=

$\frac{2 \times 2}{3 \times 3}$

=

$\frac{4}{9}$

4.

$\frac{16 \times 51}{17 \times 64}$

=

$\frac{1 \times 3}{1 \times 4}$

=

$\frac{3}{4}$