Question

Помогите пожалуйста

Answer 1

Решить примеры.

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

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

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

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