小数乘法简便计算.doc

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1、0.25×16.2×4(1.25－0.125)×83.6×1023.72×3.5＋6.28×3.515.6×2.1－15.6×1.14.8×10.14.8×7.8＋78×0.52（怎样变化？）56.5×99＋56.57.09×10.8－0.8×7.091.87×9.9＋0.1874.2×99＋4.21.25×2.5×323.83×4.56＋3.83×5.444.36×12.5×89.7×99＋9.727.5×3.7－7.5×3.70.65×1013.2×0.25×12.53.14×0.68＋31.4×0.032

2、7.2×0.2＋2.4×1.48.9×1.017.74×（2.8－1.3）＋1.5×2.263.9×2.7＋3.9×7.312.7×9.9＋1.275.4×11-5.42.3×16+2.3×23+2.33.65×4.7－36.5×0.3746×57＋23×862.22×9.9+6.66×6.7101×0.87-0.91×8710.7×16.1-15.1×10.70.39×1990.32×4030.25×360.25×0.73×43.65×10.17.6×0.8＋0.2×7.60.85×9.90.25×8.5×4

3、1.28×8.6＋0.72×8.612.5×0.96×0.810.6×0.35－9.6×0.35