393. Найдите значение суммы:
[tex]2) - 1 + 2 \frac{1}{9} \\ 4) - \frac{5}{7} + \frac{4}{7} \\ 6) - \frac{1}{6} + 1 \\ 8) \frac{7}{15} - \frac{11}{15} \\ 10) - \frac{5}{6} + \frac{2}{3} \\ 12) - \frac{1}{2} + \frac{1}{8} [/tex]
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[tex]2) - 1 + 2 \frac{1}{9} \\ 4) - \frac{5}{7} + \frac{4}{7} \\ 6) - \frac{1}{6} + 1 \\ 8) \frac{7}{15} - \frac{11}{15} \\ 10) - \frac{5}{6} + \frac{2}{3} \\ 12) - \frac{1}{2} + \frac{1}{8} [/tex]
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Ответ:
- 1 + 2 1/9 = 1 1/9
- 5/7 + 4/7 = - 1/7
- 1/6 + 1 = 5/6
7/15 - 11/15 = - 4/15
- 5/6 + 2/3 = - 1/6
- 1/2 + 1/8 = - 3/8