下面各题怎样算简便就怎样算．
3.28×4.6+6.72×4.6            0.25×1.25×0.4
9.73×2.8﹣4.73×2.8．         12.5×4+3.12÷1.2
25.2﹣（7.8﹣2.6）×1.3        14.08÷[0.8×（7.93﹣2.43）]．