Question

Сложите дроби: 1/4 + 5/6, 2/9 + 1/6, 1/6 + 3/8, 1/12 + 4/15, 3/10 + 5/8, 7/12 + 1/8, 3/20 + 7/25, 2/9 + 7/12

Answer 1

$frac{1}{4}+frac{5}{6}=frac{3}{12}+frac{10}{12}=frac{13}{12}=1frac{1}{12}\\ frac{2}{9}+frac{1}{6}=frac{4}{18}+frac{3}{18}=frac{7}{18}\\ frac{1}{6}+frac{3}{8}=frac{4}{24}+frac{9}{24}=frac{13}{24}\\ frac{1}{12}+frac{4}{15}=frac{5}{60}+frac{16}{60}=frac{21}{60}=frac{7}{20}\\ frac{3}{10}+frac{5}{8}=frac{12}{40}+frac{25}{40}=frac{37}{40}\\ frac{7}{12}+frac{1}{8}=frac{14}{24}+frac{3}{24}=frac{17}{24}$
$frac{3}{20}+frac{7}{25}=frac{15}{100}+frac{28}{100}=frac{43}{100}=0.43\\ frac{2}{9}+frac{7}{12}=frac{8}{36}+frac{21}{36}=frac{29}{36}$