1.5×0.32×1.25=(1.5×0.4)×(0.8×1.25)=0.6×1=0.65.24+5.24×99=5.24×(1+99)=5.24×100=5240.8×[13-(3.12+5.28)]=0.8×(13-8.4)=0.8×4.6=(1-0.2)×4.6=4.6-0.92=3.687.45×5.2÷2.6=7.45×(5.2÷2.6)=7.45×2=14.9
(1.5x0、4)(0、8x1、25)
(1.5×0.4)×(0.8×1.25)