a) 7,646 - (6,9 – 2,054) = 7,646 - 6,9 + 2,054 = 0,746 + 2,054 = 2,8
Ответ: 2,8
б) 4,17 + (9,182 – 4,17) = 4,17 + 9,182 - 4,17 = 9,182
Ответ: 9,182
в) \(\frac{4}{9}\) + (\(\frac{1}{9}\) – \(\frac{2}{3}\)) = \(\frac{4}{9}\) + \(\frac{1}{9}\) - \(\frac{2}{3}\) = \(\frac{5}{9}\) - \(\frac{6}{9}\) = -\(\frac{1}{9}\)
Ответ: -\(\frac{1}{9}\)
г) (3\(\frac{5}{8}\) + 2\(\frac{2}{13}\)) - (2\(\frac{7}{8}\) + 1\(\frac{2}{13}\)) = 3\(\frac{5}{8}\) + 2\(\frac{2}{13}\) - 2\(\frac{7}{8}\) - 1\(\frac{2}{13}\) = (3\(\frac{5}{8}\) - 2\(\frac{7}{8}\)) + (2\(\frac{2}{13}\) - 1\(\frac{2}{13}\)) = (3 - 2 + \(\frac{5}{8}\) - \(\frac{7}{8}\)) + (2 - 1 + \(\frac{2}{13}\) - \(\frac{2}{13}\)) = (1 - \(\frac{2}{8}\)) + (1 + 0) = 1 - \(\frac{1}{4}\) + 1 = 2 - \(\frac{1}{4}\) = 1\(\frac{3}{4}\)
Ответ: 1\(\frac{3}{4}\)
д) -(3,69 – 6\(\frac{2}{13}\)) - (1,31 – 8\(\frac{11}{13}\)) = -3,69 + 6\(\frac{2}{13}\) - 1,31 + 8\(\frac{11}{13}\) = (-3,69 - 1,31) + (6\(\frac{2}{13}\) + 8\(\frac{11}{13}\)) = -5 + (6 + 8 + \(\frac{2}{13}\) + \(\frac{11}{13}\)) = -5 + (14 + \(\frac{13}{13}\)) = -5 + 15 = 10
Ответ: 10
е) -(\(frac{5}{8}\) + 2,43) - (-5,93 – \(\frac{1}{4}\)) = -\(\frac{5}{8}\) - 2,43 + 5,93 + \(\frac{1}{4}\) = -\(\frac{5}{8}\) + \(\frac{1}{4}\) + 5,93 - 2,43 = -\(\frac{5}{8}\) + \(\frac{2}{8}\) + 3,5 = -\(\frac{3}{8}\) + 3,5 = -0,375 + 3,5 = 3,125
Ответ: 3,125
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