Ответ:
\(2\dfrac{3}{8}=\dfrac{19}{8}\), \(1.5=\dfrac32\).
\(\dfrac{19}{8}-\dfrac{9}{14}=\dfrac{97}{56}\).
\(-5\cdot\dfrac{97}{56}\cdot\dfrac32=-\dfrac{1455}{112}=-12\dfrac{111}{112}\).
Ответ: \(-12\dfrac{111}{112}\).
\(2\dfrac{3}{8}=\dfrac{19}{8}\), \(1.5=\dfrac32\).
\(\dfrac{19}{8}-\dfrac{9}{14}=\dfrac{97}{56}\).
\(-5\cdot\dfrac{97}{56}\cdot\dfrac32=-\dfrac{1455}{112}=-12\dfrac{111}{112}\).
Ответ: \(-12\dfrac{111}{112}\).