1.25×8.8×0.7=1.25×（8+0.8）×0.7=（1.25×8+1.25×0.8）×0.7=11×0.7=7.7.
1.25*（0.8-0.1）=1.25*0.8-1.25*0.1=1-0.125=0.875
1.25×（0.8-0.1）=1.25×0.8-1.25×0.1=1-0.125=0.875
