1) -0.8a*(-0.45cm)=08a*0.45cm
2)-0.75mn*(-0.6k)=0.75mn*0.6k
3)4.8x-2.1y-1.8x+0.1y=3x-2y
4)-4.5m+5.5n-1.5m+1.9n=-6m+7.4n
1) -0.8a*(-0.45cm)=08a*0.45cm
2)-0.75mn*(-0.6k)=0.75mn*0.6k
3)4.8x-2.1y-1.8x+0.1y=3x-2y
4)-4.5m+5.5n-1.5m+1.9n=-6m+7.4n