4. Вычислить: 3 15 14 16 35 27 2— + 3— = 9— + 11— = 4— + 2— = 54 54 25 25 48 48 13 37 35 47 21 25 32— + 21— = 2— + 4— = 6— + 12— = 40 40 54 54 36 36 37 5 9 5 23 2 9— - 3— = 12— - 4— = 14— - 7— = 11 11 14 14 45 45 11 9 6 5 10 8 4— - 2— = 34— - 21— = 13— - 12— = 21 21 21 21 27 27

4. Вычислить:

Решим каждый пример по порядку:

1. \[2 \frac{3}{54} + 3 \frac{15}{54} = (2 + 3) + (\frac{3}{54} + \frac{15}{54}) = 5 + \frac{18}{54} = 5 + \frac{1}{3} = 5 \frac{1}{3}\]
2. \[9 \frac{14}{25} + 11 \frac{16}{25} = (9 + 11) + (\frac{14}{25} + \frac{16}{25}) = 20 + \frac{30}{25} = 20 + \frac{6}{5} = 20 + 1 \frac{1}{5} = 21 \frac{1}{5}\]
3. \[4 \frac{35}{48} + 2 \frac{27}{48} = (4 + 2) + (\frac{35}{48} + \frac{27}{48}) = 6 + \frac{62}{48} = 6 + \frac{31}{24} = 6 + 1 \frac{7}{24} = 7 \frac{7}{24}\]
4. \[32 \frac{13}{40} + 21 \frac{37}{40} = (32 + 21) + (\frac{13}{40} + \frac{37}{40}) = 53 + \frac{50}{40} = 53 + \frac{5}{4} = 53 + 1 \frac{1}{4} = 54 \frac{1}{4}\]
5. \[2 \frac{35}{54} + 4 \frac{47}{54} = (2 + 4) + (\frac{35}{54} + \frac{47}{54}) = 6 + \frac{82}{54} = 6 + \frac{41}{27} = 6 + 1 \frac{14}{27} = 7 \frac{14}{27}\]
6. \[6 \frac{21}{36} + 12 \frac{25}{36} = (6 + 12) + (\frac{21}{36} + \frac{25}{36}) = 18 + \frac{46}{36} = 18 + \frac{23}{18} = 18 + 1 \frac{5}{18} = 19 \frac{5}{18}\]
7. \[9 \frac{37}{11} - 3 \frac{5}{11} = (9 - 3) + (\frac{37}{11} - \frac{5}{11}) = 6 + \frac{32}{11} = 6 + 2 \frac{10}{11} = 8 \frac{10}{11}\]
8. \[12 \frac{9}{14} - 4 \frac{5}{14} = (12 - 4) + (\frac{9}{14} - \frac{5}{14}) = 8 + \frac{4}{14} = 8 + \frac{2}{7} = 8 \frac{2}{7}\]
9. \[14 \frac{23}{45} - 7 \frac{2}{45} = (14 - 7) + (\frac{23}{45} - \frac{2}{45}) = 7 + \frac{21}{45} = 7 + \frac{7}{15} = 7 \frac{7}{15}\]
10. \[4 \frac{11}{21} - 2 \frac{9}{21} = (4 - 2) + (\frac{11}{21} - \frac{9}{21}) = 2 + \frac{2}{21} = 2 \frac{2}{21}\]
11. \[34 \frac{6}{21} - 21 \frac{5}{21} = (34 - 21) + (\frac{6}{21} - \frac{5}{21}) = 13 + \frac{1}{21} = 13 \frac{1}{21}\]
12. \[13 \frac{10}{27} - 12 \frac{8}{27} = (13 - 12) + (\frac{10}{27} - \frac{8}{27}) = 1 + \frac{2}{27} = 1 \frac{2}{27}\]

Ответ: 1) 5 1/3, 2) 21 1/5, 3) 7 7/24, 4) 54 1/4, 5) 7 14/27, 6) 19 5/18, 7) 8 10/11, 8) 8 2/7, 9) 7 7/15, 10) 2 2/21, 11) 13 1/21, 12) 1 2/27

Замечательно! Ты отлично справляешься с вычислениями смешанных чисел!