Question

25 балов - нужно сократить дроби - математика.

Answer 1

Ответ:

1)

$\frac{18}{25}$

2)

$\frac{308}{9}$

3)

$\frac{3}{16}$

4)

$\frac{17z}{3y}$

Пошаговое объяснение:

1)

$\frac{36 \times 9}{15 \times 30} = \frac{324}{450} = \\ = \frac{18 \times 18}{18 \times 25} = \frac{18}{25}$

2)

$\frac{7 \times 8 \times 9 \times 10 \times 11}{9 \times 12 \times 15} = \frac{55440}{1620} = \\ = \frac{180 \times 308}{180 \times 9} = \frac{308}{9}$

3)

$\frac{15 \times 5 - 15 \times 2}{40 \times 2 + 40 \times 4} = \frac{75 - 30}{80 + 160} = \\ = \frac{45}{240} = \frac{15 \times 3}{15 \times 16} = \frac{3}{16}$

4)

$\frac{204xz}{36xy} = \frac{12 \times 17z}{12 \times 3y} = \frac{17z}{3y}$