Question

Сложите дроби
1/3 + 1/4
3/5 + 9/10
2/9 + 3/8
5/12 + 4/15
1/4 + 4/7 + 9/28

Answer 1

Ответ:

$frac{1}{3} + frac{1}{4} = frac{4}{12} + frac{3}{12} = frac{7}{12} \ frac{3}{5} + frac{9}{10} = frac{6}{10} + frac{9}{10} = frac{15}{10} = frac{3}{2} = 1 frac{1}{2} \ frac{2}{9} + frac{3}{8} = frac{16}{72} + frac{29}{72} = frac{48}{72} = frac{2}{3} \ frac{5}{12} + frac{4}{15} = frac{25}{60} + frac{16}{60} = frac{41}{60} \ frac{1}{4} + frac{1}{7} + frac{9}{28} = frac{5}{7}$