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．

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．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．

用简便方法计算下面各题．43.6＋9.8＋6.4；7.3×0.25×8；2.31×1.5＋1.5×7.69．

用递等式计算（能简算的要用简便方法计算）．①13×8×125②8.9×99＋1.1×99③12.12÷（4.3×2－7.4）④47×724＋15÷65⑤14÷（1－

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