а) 1,325 - 2,41; б) 0,25 - (-2\frac{1}{6}); в) -2,4 - 1,75 - (-\frac{5}{12}); г) 3\frac{4}{21} - 5 - (-4\frac{5}{14})

Решим примеры:

а) 1,325 - 2,41 = -1,085

б) 0,25 - (-2\frac{1}{6}) = 0,25 + 2\frac{1}{6} = \frac{1}{4} + \frac{13}{6} = \frac{3}{12} + \frac{26}{12} = \frac{29}{12} = 2\frac{5}{12}

в) -2,4 - 1,75 - (-\frac{5}{12}) = -2,4 - 1,75 + \frac{5}{12} = -4,15 + \frac{5}{12} = -4\frac{15}{100} + \frac{5}{12} = -4\frac{3}{20} + \frac{5}{12} = -4\frac{9}{60} + \frac{25}{60} = -4\frac{34}{60} = -3\frac{94}{60} = -3\frac{47}{30} = -3\frac{17}{30}

г) 3\frac{4}{21} - 5 - (-4\frac{5}{14}) = 3\frac{4}{21} - 5 + 4\frac{5}{14} = 7 + \frac{4}{21} + \frac{5}{14} - 5 = 2 + \frac{8}{42} + \frac{15}{42} = 2\frac{23}{42}

Ответ: а) -1,085; б) 2\frac{5}{12}; в) -3\frac{17}{30}; г) 2\frac{23}{42}