Ответ:
- \(14\frac{9}{13}-1\frac{5}{13}+12\frac{11}{13}=25+\frac{15}{13}=26\frac{2}{13}\).
- \(7\frac{24}{25}-3\frac{12}{25}-1\frac{7}{25}=3+\frac{5}{25}=3\frac{1}{5}\).
- \(17\frac{7}{40}+3\frac{9}{40}-\frac{17}{40}=20-\frac{1}{40}=19\frac{39}{40}\).
- \(23\frac{15}{49}-13\frac{19}{49}-1\frac{30}{49}=9-\frac{34}{49}=8\frac{15}{49}\).
Ответ: а) \(26\frac{2}{13}\); б) \(3\frac{1}{5}\); в) \(19\frac{39}{40}\); г) \(8\frac{15}{49}\).
