13 20 1) 75 2) 714 Варахит 2 711 20 50 17 S 2)---- 33 22 Вариант 3 2 21 14 10 71 2)- 2) 96 51 5 5 1 A 5 15 53 #16 3) 17 34 413 4)---= 4 11 723 5 15 21 514 -- (s 34 5) 5) 13 39

Ответ: Решения математических примеров на фото.

Вариант 1

1. \[\frac{1}{2} - \frac{3}{8} = \frac{4}{8} - \frac{3}{8} = \frac{1}{8}\]

2. \[\frac{3}{7} - \frac{5}{14} = \frac{6}{14} - \frac{5}{14} = \frac{1}{14}\]

3. \[\frac{3}{5} + \frac{4}{15} = \frac{9}{15} + \frac{4}{15} = \frac{13}{15}\]

4. \[\frac{5}{8} - \frac{3}{16} = \frac{10}{16} - \frac{3}{16} = \frac{7}{16}\]

5. \[\frac{2}{9} + \frac{1}{18} = \frac{4}{18} + \frac{1}{18} = \frac{5}{18}\]

6. \[\frac{8}{13} - \frac{1}{26} = \frac{16}{26} - \frac{1}{26} = \frac{15}{26}\]

7. \[\frac{7}{15} + \frac{7}{30} = \frac{14}{30} + \frac{7}{30} = \frac{21}{30} = \frac{7}{10}\]

8. \[\frac{2}{19} - \frac{1}{38} = \frac{4}{38} - \frac{1}{38} = \frac{3}{38}\]

9. \[\frac{5}{7} - \frac{3}{14} = \frac{10}{14} - \frac{3}{14} = \frac{7}{14} = \frac{1}{2}\]

Вариант 2

1. \[\frac{7}{20} - \frac{11}{50} = \frac{35}{100} - \frac{22}{100} = \frac{13}{100}\]

2. \[\frac{17}{33} - \frac{5}{22} = \frac{34}{66} - \frac{15}{66} = \frac{19}{66}\]

3. \[\frac{5}{20} + \frac{1}{8} = \frac{10}{40} + \frac{5}{40} = \frac{15}{40} = \frac{3}{8}\]

4. \[\frac{4}{7} + \frac{13}{28} = \frac{16}{28} + \frac{13}{28} = \frac{29}{28}\]

5. \[\frac{5}{13} - \frac{14}{39} = \frac{15}{39} - \frac{14}{39} = \frac{1}{39}\]

Вариант 3

1. \[\frac{2}{21} - \frac{1}{14} = \frac{4}{42} - \frac{3}{42} = \frac{1}{42}\]

2. \[\frac{7}{9} - \frac{1}{6} = \frac{14}{18} - \frac{3}{18} = \frac{11}{18}\]

3. \[\frac{5}{17} + \frac{1}{34} = \frac{10}{34} + \frac{1}{34} = \frac{11}{34}\]

4. \[\frac{4}{15} - \frac{11}{75} = \frac{20}{75} - \frac{11}{75} = \frac{9}{75} = \frac{3}{25}\]

5. \[\frac{3}{18} + \frac{4}{27} = \frac{9}{54} + \frac{8}{54} = \frac{17}{54}\]

Ответ: Решения математических примеров на фото.