8) (-24,6+1338): 2,7 =246-13,8=-10= 2)643,2: (-87,3+85,7) =-87,3+8 g) 3,2: (-0,4-0,2)=-40 e)-4,9: (0,2-0,3-0,1) = 5 52 水)夜:(一言+3) 1 6 3.) (-0,2+3): 3,2 =

Решение:

8) \[(-24.6 + 13.8) : 2.7 = -10.8 : 2.7 = -4\] 2) \[643.2 : (-87.3 + 85.7) = 643.2 : (-1.6) = -402\] g) \(3.2 : (-0.4 \cdot 0.2) = 3.2 : (-0.08) = -40\) e) \(-4.9 : (0.2 \cdot 0.3 - 0.1) = -4.9 : (0.06 - 0.1) = -4.9 : (-0.04) = 122.5\) х) \(1\frac{5}{12} : (-\frac{5}{6} + \frac{2}{3}) = \frac{17}{12} : (\frac{-5 + 4}{6}) = \frac{17}{12} : (-\frac{1}{6}) = \frac{17}{12} \cdot (-6) = -\frac{17}{2} = -8.5\) 3) \((-0.2 + 3) : 3.2 = 2.8 : 3.2 = 0.875\)

Ответ: 8) -4; 2) -402; g) -40; e) 122.5; x) -8.5; 3) 0.875