П вариант. и вычислите 1) 13-(8,4-17) 2) 17,3--5,6+7,3) 3) (1017-22,56)+(1256-10,17 4)-(+17864)-(-17864- 5) ение выражения 14号-13-12号

13 - (8,4 - 17) = 13 - (-8,6) = 13 + 8,6 = 21,6

17,3 - (-5,6 + 7,3) = 17,3 - 1,7 = 15,6

(10,17 - 22,56) + (12,56 - 10,17) = -12,39 + 2,39 = -9,33

-(1/6 + 17,864) - (-17,864 - 1/2) = -1/6 - 17,864 + 17,864 + 1/2 = -1/6 + 1/2 = -1/6 + 3/6 = 2/6 = 1/3

14\(\frac{2}{15}\) - 13\(\frac{7}{10}\) - 12\(\frac{5}{6}\) = 14\(\frac{4}{30}\) - 13\(\frac{21}{30}\) - 12\(\frac{25}{30}\) = 14 - 13 - 12 + \(\frac{4 - 21 - 25}{30}\) = -11 + \(\frac{-42}{30}\) = -11 - 1\(\frac{12}{30}\) = -12 \(\frac{2}{5}\)