Question

Срочно помогите пожалуйста

Answer 1

Пошаговое объяснение:

а).

1).

$\frac{3}{7} a = \frac{3}{7} \times \frac{3}{7} = \frac{3 \times 3}{7 \times 7} = \frac{9}{49}$

2).

$\frac{3}{7}a = \frac{3}{7} \times \frac{1}{2} = \frac{3}{7 \times 2} = \frac{3}{14}$

3).

$\frac{3}{7} a = \frac{3}{7} \times 2\frac{1}{7} = \frac{3}{7} \times \frac{15}{7} = \frac{3 \times 15}{7 \times 7} = \frac{45}{49}$

4).

$\frac{3}{7}a = \frac{3}{7} \times 2 \frac{1}{3} = \frac{3}{7} \times \frac{7}{3} = \frac{3 \times 7}{7 \times 3} = 1$

5).

$\frac{3}{7}a = \frac{3}{7} \times \frac{28}{33} = \frac{3 \times 28}{7 \times 33} = \frac{1 \times 4}{1 \times 11 } = \frac{4}{11}$

б).

1).

$\frac{5}{12}b = \frac{5}{12} \times \frac{1}{5} = \frac{5 \times 1}{12 \times 5} = \frac{1 \times 1}{12 \times 1} = \frac{1}{12}$

2).

$\frac{5}{12}b = \frac{5}{12} \times \frac{5}{12} = \frac{25}{144}$

3).

$\frac{5}{12}b = \frac{5}{12} \times 1 \frac{1}{5} = \frac{5}{12} \times \frac{6}{5} = \frac{5 \times 6}{12 \times 5} = \frac{1 \times 1}{2 \times 1} = \frac{1}{2}$

4).

$\frac{5}{12}b = \frac{5}{12} \times 2 \frac{2}{5} = \frac{5}{12} \times \frac{12}{5} = \frac{5 \times 12}{12 \times 5} = \frac{1 \times 1}{1 \times 1} = 1$