1. Найдите значение выражения: -3,5 \(\cdot\) \(-2\frac{1}{7}\) 2) (-9,8+25,06):(-0,1) 3) 8,06-(-3,45)-22,83 4) 75,6:1,5 - \(\left\)\(\left(2,48+\frac{1}{8}-2,48+0,125\right):\frac{1}{4}\right\):23\(\frac{1}{3}\) \(\cdot\) \(\left\)\(1\frac{1}{2}-0,026\right\)

1. Найдите значение выражения:

1. \( -3.5 \cdot \left(-2\frac{1}{7}\right) = -\frac{35}{10} \cdot \left(-\frac{15}{7}\right) = -\frac{7}{2} \cdot \left(-\frac{15}{7}\right) = \frac{15}{2} = 7.5 \)
2. \( (-9.8+25.06):(-0.1) = 15.26 : (-0.1) = -152.6 \)
3. \( 8.06 - (-3.45) - 22.83 = 8.06 + 3.45 - 22.83 = 11.51 - 22.83 = -11.32 \)
4. \( 75.6 : 1.5 - \left\(\left(2.48 + 0.125 - 2.48 + 0.125\right): 0.25\right\): \(\frac{70}{3}\) \(\cdot\) \(\left\)\(1.5 - 0.026\right\) \)
   \( = 50.4 - \left\(\left(0.25\right):0.25\right\): \(\frac{70}{3}\) \(\cdot\) 1.474 \)
   \( = 50.4 - \left(1\right): \frac{70}{3} \cdot 1.474 \)
   \( = 50.4 - 1 \cdot \frac{3}{70} \cdot 1.474 \)
   \( = 50.4 - \frac{3 \cdot 1.474}{70} \)
   \( = 50.4 - \frac{4.422}{70} \)
   \( = 50.4 - 0.06317... \) (Приближенное значение) \)

Ответ: 1) 7.5; 2) -152.6; 3) -11.32; 4) приблизительно 50.337