Question

8 - 4,2:(25/ 15 - 1 4/21)

Answer 1

Ответ:

$= 8 - 4.2 \div ( \frac{5}{3} - \frac{2}{3} ) = \\ 8 - 4.2 \div \frac{3}{3} = \\ 8 - 4.2 \div 1 = \\ 8 - 4.2 = 3.8$