1.25*8*1.1=10*1.1=11
(1)7/8÷3/4+7/8x2/3=7/8x4/3+7/8x2/3=7/8x(4/3+2/3)=7/8x2=7/4(2)0.45×1/6÷0.45x1/6=(0.45÷0.45)x(1/6x1/6)=1x1/36=1/36(3)4.8÷5/13-4又4/5x1.6=4.8x13/5-4.8x8/5=4.8x(13/5-8/5)=4.8x1=4.8