Question

-2,4 . 17/4 + 12/7 . (-85/6) - 2,4 . (-5 5/4) - 12/7 . (-71/6)

Answer 1

\(-2,4\cdot\dfrac{17}{4}+\dfrac{12}{7}\cdot\left(-\dfrac{85}{6}\right)-2,4\cdot\left(-5\dfrac{5}{4}\right)-\dfrac{12}{7}\cdot\left(-\dfrac{71}{6}\right)\)

\(=-2,4\cdot\dfrac{17}{4}-2,4\cdot\left(-\dfrac{25}{4}\right)+\dfrac{12}{7}\cdot\left(-\dfrac{85}{6}\right)+\dfrac{12}{7}\cdot\dfrac{71}{6}\)

\(=-2,4\cdot\left(\dfrac{17}{4}-\dfrac{25}{4}\right)+\dfrac{12}{7}\cdot\left(-\dfrac{85}{6}+\dfrac{71}{6}\right)\)

\(=-2,4\cdot\left(-2\right)+\dfrac{12}{7}\cdot\left(-\dfrac{7}{3}\right)\)

\(=4,8-4\)

\(=0,8\)

#\(Toru\)