Question

4) 2/5 : 8
5) x-1/5 * 10/x-1
6) 6 * ab/12

Answer 1

Объяснение:

4)

$\frac{2}{5} \div 8 = \frac{2}{5 \times 8} = \frac{2}{40 } = \frac{1}{20} =0.05$

5)

$\frac{x - 1}{5} \times \frac{10}{x - 1} = \frac{(x - 1) \times 10}{5(x - 1)} = 2$

6)

$6 \times \frac{ab}{12} = \frac{ab}{2}$