Question

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


((1 1/2) вторая степень - 3/4) : 7/8

Answer 1

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