（1）17.48×37-174.8×1.9+1.748×820=17.48×37-17.48×19+17.48×82=17.48×（37-19+82）=17.48×100=1748（2）0.5×1.6×0.02×1.25×0.2×0.025=（0.5×0.2）×（1.25×8）×（0.02×0.2×0.025）=0.1×10×0.0...