1327. Найдите значение выражения: 1) (3+0,25-1,2):(2,2-4,0,75):(-4) 2) -24,6:(-2,35+0,7:23)-15,36; 3) (5-5,1,25-11,5):(-1,5); 4) (-3,1-1,9+19,5:4,5):(0,16-0,75); 5) -2,2:4,125+1,6-3,3 9-5,6-2,4 6) -2,7:1,5-1,6-(-0,3) -9,5:(5,7-4,12) 7) -0,4-(-6,3:3,15-0,9) -48-2-(-91) 8) (-13,6+5,1)-1,2-(2,4-1,7):2,3

Решение:

1. \( (3+0.25-1.2):(2.2-4 0.75):(-4) = (2.05) : (2.2-3) : (-4) = 2.05 : (-0.8) : (-4) = -2.5625 : (-4) = 0.640625 \)
2. \( -24.6 : (-2.35 + 0.7 : 23) - 15.36 = -24.6 : (-2.35 + 0.0304) - 15.36 = -24.6 : (-2.3196) - 15.36 \approx 10.605 - 15.36 = -4.755 \)
3. \( (5-5.1,25-11.5):(-1.5) = (-1.625-11.5):(-1.5) = -13.125 : (-1.5) = 8.75 \)
4. \( (-3.1-1.9+19.5:4.5):(0.16-0.75) = (-5+4.333):(-0.59) = -0.667 : (-0.59) \approx 1.13 \)
5. \( \frac{-2.2}{4.125} + \frac{1.6-3.3}{9-5.6-2.4} = \frac{-2.2}{4.125} + \frac{-1.7}{1} = -0.533 - 1.7 = -2.233 \)
6. \( \frac{-2.7}{1.5} - \frac{1.6 - (-0.3)}{-9.5:(5.7-4.12)} = -1.8 - \frac{1.9}{-9.5:(1.58)} = -1.8 - \frac{1.9}{-6.012} \approx -1.8 - (-0.316) = -1.484 \)
7. \( -0.4 - (-6.3 : 3.15 - 0.9) = -0.4 - (-2 - 0.9) = -0.4 - (-2.9) = 2.5 \)
8. \( (-13.6+5.1)-1.2-(2.4-1.7):2.3 = -8.5 - 1.2 - (0.7):2.3 = -9.7 - 0.304 = -10.004 \)