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B) -1/12* 1,2= -1/12 * 6/5=-0,1
c) 3 1/2*(-2 2/3)= 7/2 * -8/3=-28/3=-9 1/3
d) -2/3*(-5/6)= 10/18
e) -2,5*(-0,8)*(-1)= -2
f) -8,52*(-1,8)*(-2)= -30,672
g) -4*(-1,5)*(-10)*(-2,2)= 132
h) -3,8 * (-5)*(-2)*(-6,1)*(-1)=-231,8
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b) -1/12* 1,2= -1/12*12/10=-1/10
c) 3 1/2*(-2 2/3)= 7/2*(-8/3)=-28/3=-9 1/3
d) -2/3*(-5/6)= 5/9
e) -2,5*(-0,8)*(-1)= -5/2*(-8/10)*(-1)=-2
f) -8,52*(-1,8)*(-2)= 852/100*18/10*(-2)=213/25*9/5*(-2)=1917/125 *(-2)=-3834/125=-30,672
g) -4*(-1,5)*(-10)*(-2,2)= 6*22=132
h) -3,8 * (-5)*(-2)*(-6,1)*(-1)= -3,8*10*6,1=-38*6,1=-231,8
___ ___ ___ __
3000 300 60 12
b) = -12 = 1
____ ___
120 10
c) 56 =11 1
___ _
6 6
d)10 = 5
___ __
18 9
e)-2
f)-30,672
g)132
h)-231,8