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b)2,6-1,458=1,142
c)-3,8-4,52=-8,32
d)2 2/3*(-1,5)=8/3*(-15/10)=8/3*(-3/2)=-4/1=-4
e)2,7+1 1/3=27/10+4/3=81/30+40/30=121/30=4 1/30
f)-5-2,27*(-1/3)=-5-227/100*(-1/3)=-5+227/300=-4 73/300
g)3/4:(-1 1/2)=3/4:(-3/2)=3/4*(-2/3)=-1/2
h)-3,5+(-1 2/7)=-35/10+(-9/7)=-7/2+(-9/7)=-49/14+(-18/14)=-67/14=-4 11/14