Question

Помогите пожалуйста

Answer 1

Решить примеры.

а) $2*1\dfrac{3}{4} = 2*\dfrac{7}{4} = \dfrac{2*7}{4} = \dfrac{7}{2} = 3,5.$

б) $1\dfrac{2}{7} * (-14) = \dfrac{9}{7} * (-14) = -\dfrac{9*14}{7} = -9*2 = -18.$

в) $-7\dfrac{2}{7}:(-3) = -\dfrac{51}{7}:(-3) = \dfrac{51}{7}:3 = \dfrac{51}{7}*\dfrac{1}{3} = \dfrac{51}{7*3} = \dfrac{17}{7} = 2\dfrac{3}{7}.$

г) $-3\dfrac{2}{5}:5 = -\dfrac{17}{5}:5 = -\dfrac{17}{5} * \dfrac{1}{5} = -\dfrac{17}{5*5} = -\dfrac{17}{25}.$