Question

-0,8+(-1 1/5) +1 1/4

Answer 1

$displaystyle tt -0,8+(-1frac{1}{5})+1frac{1}{4}=-frac{8}{10}-frac{6}{5}+frac{5}{4}=-frac{16}{20}-frac{24}{20}+frac{25}{20}=-frac{40}{20}+frac{25}{20}=-frac{15}{20}=-frac{3}{4}=-0,75$