Question

помогите пажалуста я дам 10 балав

Answer 1

Ответ:

1)

1)

$\frac{1}{8}$

2)

$\frac{18}{77}$

3)

$\frac{5}{13}$

4)

$\frac{9}{25}$

2)

1)

$\frac{16}{21}$

2)

$\frac{7}{3}$

3)

$6$

4)

$\frac{12}{5}$

Пошаговое объяснение:

1)

1)

$\frac{5}{6} \times \frac{3}{20} = \frac{5 \times 3}{6 \times 20} = \\ = \frac{15}{120} = \frac{15 \times 1}{15 \times 8} = \frac{1}{8}$

2)

$\frac{3}{7} \times \frac{6}{11} = \frac{3 \times 6}{7 \times 11} = \\ = \frac{18}{77}$

3)

$\frac{10}{11} \times \frac{11}{26} = \frac{10 \times 11}{11 \times 26} = \\ = \frac{10}{26} = \frac{2 \times 5}{2 \times 13} = \\ = \frac{5}{13}$

4)

$\frac{24}{65} \times \frac{39}{40} = \frac{24 \times 39}{65 \times 40} = \\ = \frac{936}{2600} = \frac{104 \times 9}{104 \times 25} = \\ = \frac{9}{25}$

2)

1)

$4 \times \frac{4}{21} = \frac{4 \times 4}{21} = \frac{16}{21}$

2)

$6 \times \frac{7}{18} = \frac{6 \times 7}{18} = \frac{7}{3}$

3)

$\frac{3}{14} \times 28 = \frac{3 \times 28}{14} = 3 \times 2 = \\ = 6$

4)

$5 \frac{3}{5} \times \frac{3}{7} = \frac{28}{5} \times \frac{3}{7} = \\ = \frac{4 \times 3}{5} = \frac{12}{5}$