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a)
-6,8 : 8 1/3 : (-1,7 ) : (-1 4/5 ) : (-0,8) : 3 =
= - 34/5:25/3:(-17/10):(- 9/5):(- 4/5):3 =
= - 34/5 * 3/25 * (- 10/17) * (- 5/9) * (- 5/4) * 1/3 =
= - 1/1 * 1/1 * (- 1/1) * (-1/3) * (- 1/1) * 1/3 = 1/9
b)
-4,2 : (-2 1/3 ) : (-0,036) : (-25) : (-1/3) =
= - 21/5 : (- 7/3) : (- 36/1000) : (-25) : (- 1/3) =
= - 21/5 * (- 3/7) * (- 1000/36) * (- 1/25) * (- 3/1) =
= - 3/1 * (- 1/1) * (- 8/4) * (- 1/1) * (-1/1) =
= - 3 * ( -1) * (- 2) * (-1) * (- 1) = - 6
c)
33,3 :(-1,11) x 30 : (-4 1/2 ) : 2 6/7 * (-0,1) =
= - 30 * 30 : (- 9/2) : 20/7 * (- 1/10) =
= - 900 * (- 2/9) * 7/20 * (- 1/10) =
= - 900 * (- 1/9) * 7/10 * (-1/10) =
= - 900 * 7/900 =
= - 7
d)
-(-0,006 ) : (-0,04) : 1 1/5 x (-3,2) x 2 3/4 : (-2,2) =
= - 0,15 : 6/5 * (- 16/5) * 11/4 * (- 5/11) =
= - 15/100 * 5/6 * (-4/1) * 1/1 * (- 1/1) =
= - 5/5 * 1/2 * (-1) * 1 * (-1) =
= - 1/2