Вычислите:
а) (6-15):(7-2,5)=
б) (2,8-6):(1-1,8)=
в) (5,1/6-8):(1-2/3)=
г) (1,5/9+2,11/18):(-2,1/2)=
а) (6-15):(7-2,5)=
б) (2,8-6):(1-1,8)=
в) (5,1/6-8):(1-2/3)=
г) (1,5/9+2,11/18):(-2,1/2)=
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А) (6-15):(7-2,5)=-6:4,5=-60/45=-4/3=-1 1/3б) (2,8-6):(1-1,8)=-3,2/(-0,8)=32/8=4
в) (5,1/6-8):(1-2/3)=2 5/6:1/3=17/6*3/1=17/2*1/1=17/2=8 1/2=8,5
г) (1,5/9+2,11/18):(-2,1/2)=(1 10/18+2 11/18):(-5/2)=3 21/18:(-5/2)=-75/18*2/5=
=-15/9=-5/3=-1 2/3