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b) 1,25:(-1,4)=1,25:(-0,25)=-5
c) -9*1/3 = -3
d) -2 1/3*(-1 2/7)=
-7/3*(-9/7)=3
e) -1 1/3:(-3/4)=
-4/3:(-3/4)=
-4/3*(-4/3)=16/9 = 1 7/9
f) 1/3*2 1/4=
1/3*9/4=3/4
g) -2 1/2:(-2/5)=
-5/2:(-2/5)=
-5/2*(-5/2)=25/4 = 6,25
h) 3,5:(-1/2)=
3,5:(-0,5)=-7
i) -1 1/2*(-3 1/30)=
-3/2*(-91/30)=
91/20 = 4,55
j) -6*1/2 =
-6*0,5=-3
k) 3/4*8/9 = 2/3
l) 3/4:1 1/2=
3/4:3/2=
3/4*2/3=1/2