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МатематикаВопрос:
10) 8 \(\frac{2}{31}\) - 7 \(\frac{17}{31}\) + 2 \(\frac{30}{31}\) =
Ответ:
Решение:
Приведём дроби к общему знаменателю (он уже есть).
\( 8 \frac{2}{31} - 7 \frac{17}{31} + 2 \frac{30}{31} = (8 - 7 + 2) + (\frac{2}{31} - \frac{17}{31} + \frac{30}{31}) \)
\( = 3 + \frac{2 - 17 + 30}{31} = 3 + \frac{15}{31} = 3 \frac{15}{31} \)
Ответ: 3 \(\frac{15}{31}\)
Похожие
- 5) 8 \(\frac{1}{9}\) + 3 \(\frac{8}{9}\) - 9 \(\frac{4}{9}\) =
- 1) 2 \(\frac{6}{7}\) + x = 5 \(\frac{6}{7}\)
- 7) k + 3 \(\frac{2}{23}\) = 3 \(\frac{20}{23}\)
- 13) 3 \(\frac{6}{13}\) - x = 2 \(\frac{2}{13}\)
- 2) 3 \(\frac{1}{11}\) + a = 10 \(\frac{1}{11}\)
- 8) 7 \(\frac{1}{5}\) + t = 9 \(\frac{4}{5}\)
- 14) 2 \(\frac{4}{9}\) - a = \(\frac{2}{9}\)
- 3) b + 1 \(\frac{8}{9}\) = 3 \(\frac{8}{9}\)
- 9) 6 \(\frac{5}{9}\) - y = 2 \(\frac{5}{9}\)
- 15) 4 - c = 3 \(\frac{7}{9}\)
- 4) y + \(\frac{8}{13}\) = 4 \(\frac{8}{13}\)
- 10) 9 \(\frac{7}{11}\) - b = 3 \(\frac{7}{11}\)
- 16) 5 - z = 4 \(\frac{2}{11}\)
- 5) 2 + m = 2 \(\frac{5}{7}\)
- 11) k - \(\frac{1}{5}\) = 3 \(\frac{3}{5}\)
- 17) p - 1 \(\frac{2}{3}\) = 1 \(\frac{1}{3}\)
- 6) 5 + p = 5 \(\frac{7}{9}\)
- 12) n - \(\frac{2}{7}\) = 5 \(\frac{4}{7}\)
- 18) m - 3 \(\frac{5}{7}\) = 1 \(\frac{2}{7}\)
- 1) x + 2 \(\frac{3}{7}\) = 4 \(\frac{1}{7}\)
- 5) 3 \(\frac{3}{8}\) + k = 5 \(\frac{1}{8}\)
