Question

Найдите значение выражения (3 1/6 - 2 7/16) : 1 2/5

((1 1/2) вторая степень - 3/4) : 7/8

Answer 1

$(3 \frac{1}{6} - 2 \frac{7}{16} ) \div 1 \frac{2}{5} = ( \frac{19}{6} - \frac{39}{16} ) \div \frac{7}{5} = \frac{35}{48} \times \frac{5}{7} = \frac{5}{48} \times 5 = \frac{25}{48} \\ \\ - - - - - - - - - - - - - \\ \\ (1 \frac{ {1}^{2} }{2} - \frac{3}{4} ) \div \frac{7}{8} = (( \frac{3}{2} ) {}^{2} - \frac{3}{4} ) \times \frac{8}{7} = ( \frac{9}{4} - \frac{3}{4} ) \times \frac{8}{7} = \frac{3}{2} \times \frac{8}{7} = 3 \times \frac{4}{7} = \frac{12}{7}$