Question

Вычеслите -1/5+1/6-1/10+1/12

Answer 1

$-frac{1}{5}+frac{1}{6}-frac{1}{10}+frac{1}{12}=-(frac{1}{5}+frac{1}{10})+(frac{1}{6}+frac{1}{12})=\\=-(frac{2}{10}+frac{1}{10})+(frac{2}{12}+frac{1}{12})=-frac{3}{10}+frac{3}{12}=-frac{18}{60}+frac{15}{60}=-frac{3}{60}=\\=-frac{1}{20}=-0,05$