小数简便运算练习

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1、一、脱式计算（能简算的要简算）2.5×7.1×416.12×99＋16.125.2×0.9＋0.97.28×99+7.284.3×50×0.264－2.64×0.526×15.7＋15.7×24(2.275＋0.625)×0.283.94+34.3×0.22.7×5.4×3.91.2×(9.6÷2.4)÷4.88.9×1.1×4.712.5×0.4×2.5×80.87×3.16+4.64(1.25－0.125)×86.58×4.5×0.93.6×9.85-5.468.05×3.4+7.62.8×0.5+1.584.8－4.8×0.59.5×9913.5×0.9812.5×8.856.5

2、×99＋56.54.8×100.14.4×0.8－3.4×0.87.09×10.8－0.8×7.098.7×17.4-8.7×7.42.13.×0.×82576.81+6.81×990.25×185×40(9.37+9.37+9.37+9.37)×2．59.5×1014.2×1.25＋4.2×1.752.37×6.3+2.37×3.72.5×1.25×0.323.8×10.12.5×(3.8×0.04)7.69×101一、用竖式计算。2.52×3.41.08×250.12×0.440.042×0.54(验算)0.25×0.046（验算）2计算下列各题，结果保留一位小数。4.8×0.35

3、3.12×0.95、计算下列各题，结果保留二位小数。6.03×0.253.45×1.24