用简便方法计算．1.25×4×2.5×0.88.08×1.252.5×（40－－0.4）99×0.453.7×4.3＋3.7×1.2＋3.7×4.5．

用简便方法计算下面各题99÷4.5　　　　　12÷1.5÷2　　　　　1.28×6－1.28－1.28×545×101　　　　　　4÷2.5　　　　　　12.5×1.3×0.8．

用简便方法计算．0.3×2.5×0.40.78×1012.5×（8＋0.4）1.25×0.7×0.89.8×2.550.8×101－50.84.6×99＋4.60.25×32×0.125

用简便方法计算下面各题，要写出计算过程．①1.25×0.25×32②0.2×60.4＋60.4＋9.8．

用简便方法计算． ①1.25×0.25×32②0.25×3.78×4③6.74×10.1④0.85×99⑤6.8×3.7＋6.8×6.3．

能简算的要用简便方法计算①3.28×0.46＋6.72×0.46②9.73×2.8－4.73×2.8③1.35×6.2＋5.79÷0.3④27.9＋3.6×2.5÷0.48⑤0

用简便方法计算，写出简算过程（1）2.5×3.2×1.25（2）4.05－（2.05＋527）（3）5.39＋127＋4.61＋57（4）0.588×123＋4×9.412＋