4. Вычислите: 1)-6・42・(-5): 2)-0,4-19-25: 3) 1,25(-8)-(-0,5) (-2); 4)4.78 (-4)・25・(-0,001): 5)-(-2,6)-0,6-(-2); 5 7 859 6)-(-)(-58).

1) -6 ⋅ 42 ⋅ (-5) = -6 ⋅ (-5) ⋅ 42 = 30 ⋅ 42 = 1260

2) -0,4 ⋅ 19 ⋅ 25 = -0,4 ⋅ 25 ⋅ 19 = -10 ⋅ 19 = -190

3) 1,25 ⋅ (-8) - (-0,5) ⋅ (-2) = -10 - 1 = -11

4) 4.78 ⋅ (-4) ⋅ 25 ⋅ (-0,001) = 4.78 ⋅ (-100) ⋅ (-0,001) = 4.78 ⋅ 0,1 = 0,478

5) \(\frac{5}{7} \cdot (\frac{-2}{6}) \cdot 0,6 \cdot (\frac{-2}{1}) = \frac{5}{7} \cdot (\frac{-1}{3}) \cdot \frac{3}{5} \cdot (-2) = \frac{5 \cdot (-1) \cdot 3 \cdot (-2)}{7 \cdot 3 \cdot 5} = \frac{30}{105} = \frac{2}{7}\)

6) \(\frac{8}{9} \cdot (\frac{5}{29}) \cdot \frac{9}{16} \cdot (-58) = \frac{8 \cdot 5 \cdot 9 \cdot (-58)}{9 \cdot 29 \cdot 16} = \frac{5 \cdot (-2)}{1} = -10\)