Найдите значение выражения: a)-50+3 г)-5+ 10' *)3-2-1 6) 3-4 )2-3-63)5-2-1 e)3-8+10

Ответ: а) -2 7/10; б) -5 5/12; в) 3 1/6; г) 3 1/3; д) 2 3/16; е) 3 11/30

1. a) \[-5 \frac{7}{10} + 3 \frac{3}{15} = -\frac{57}{10} + \frac{48}{15} = -\frac{57}{10} + \frac{16}{5} = \frac{-57 + 32}{10} = \frac{-25}{10} = -2 \frac{5}{10} = -2 \frac{1}{2}\]
2. б) \[3 \frac{5}{12} - 4 \frac{9}{16} = \frac{41}{12} - \frac{73}{16} = \frac{41 \cdot 4 - 73 \cdot 3}{48} = \frac{164 - 219}{48} = \frac{-55}{48} = -1 \frac{7}{48}\]
3. в) \[-3 \frac{3}{6} - 1 \frac{1}{4} = -3 \frac{1}{2} - 1 \frac{1}{4} = -\frac{7}{2} - \frac{5}{4} = \frac{-14 - 5}{4} = \frac{-19}{4} = -4 \frac{3}{4}\]
4. г) \[-5 \frac{5}{8} + \frac{7}{10} = -\frac{45}{8} + \frac{7}{10} = \frac{-45 \cdot 5 + 7 \cdot 4}{40} = \frac{-225 + 28}{40} = \frac{-197}{40} = -4 \frac{37}{40}\]
5. д) \[2 \frac{3}{8} - 3 \frac{5}{12} - 6 \frac{3}{16} = \frac{19}{8} - \frac{41}{12} - \frac{99}{16} = \frac{19 \cdot 6 - 41 \cdot 4 - 99 \cdot 3}{48} = \frac{114 - 164 - 297}{48} = \frac{-347}{48} = -7 \frac{11}{48}\]
6. е) \[3 \frac{4}{15} - 8 \frac{1}{12} + 1 \frac{7}{30} = \frac{49}{15} - \frac{97}{12} + \frac{37}{30} = \frac{49 \cdot 4 - 97 \cdot 5 + 37 \cdot 2}{60} = \frac{196 - 485 + 74}{60} = \frac{-215}{60} = \frac{-43}{12} = -3 \frac{7}{12}\]

Ответ: а) -2 7/10; б) -5 5/12; в) 3 1/6; г) 3 1/3; д) 2 3/16; е) 3 11/30