Question

am nevoie urgent de rezolvare

Answer 1

$a) -\frac{9}{10}-\frac{5}{12}+\frac{2}{15}-\frac{7}{30}=\frac{-9\cdot3\cdot2-5\cdot5+2\cdot4-2\cdot7}{60}=\frac{12665}{60}=211\frac{5}{60}\\ \\b) \frac{3}{4}-\frac{5}{24}+\frac{7}{85}-\frac{1}{16}=\frac{12\cdot3-5\cdot2+7\cdot6-3}{48}=\frac{65}{48}=1\frac{17}{48}$

$c) -\frac{7}{36}-\frac{5}{18}-\frac{1}{24}+\frac{11}{48}=\frac{-7\cdot4-5\cdot8-6+33}{144}=\frac{-74+33}{144}=-\frac{41}{144}$

$d) -\frac{5}{48}+\frac{7}{18}-\frac{1}{36}-\frac{11}{12}=\frac{-5\cdot3-7\cdot8-1\cdot 2^{2}-11\cdot3\cdot4}{144}=\frac{-15+56-4-132}{144}=-\frac{95}{144}$