52.8*0.45-0.45怎么简便算和16*2.61*0.025*1.25怎么简便算
问题描述：
52.8*0.45-0.45怎么简便算和16*2.61*0.025*1.25怎么简便算
答
52.8 × 0.45 - 0.45 = 52.8 × 0.45 - 0.45 × 1 = （52.8 - 1）× 0.45 = 51.8 × 0.45 = 23.31 16 × 2.61 × 0.025 × 1.25 ...