Question

Значение выражения 512lk+(−16lk)+lk+(4lk−14lk) равно...

Answer 1

$\dfrac{5}{12} lk+\Big(-\dfrac{1}{6}lk\Big)+lk+\Big(4lk-\dfrac{1}{4}lk\Big)=\dfrac{5}{12} lk-\dfrac{1}{6}lk+lk+4lk-\dfrac{1}{4}lk=\\\\\\=\Big(\dfrac{5}{12} lk-\dfrac{1}{6}lk-\dfrac{1}{4}lk\Big)+5lk=\Big(\dfrac{5}{12} lk-\dfrac{2}{12}lk-\dfrac{3}{12}lk\Big)+5lk=\boxed{5lk}$