小數(shù)混合計算專題

小數(shù)混合運算專題訓練一、直接計算1．直接寫得數(shù)。5×0.04＝4.8＋4.08＝3.6÷0.2＝3.9×0.01＝0.63÷0.9＝0.36÷12＝2．直接寫得數(shù)。0.25×4＝6.5×0.33×0＝10.73－3－7＝1÷0.125＝1－0.07＝2.4×5÷2.4＝8÷0.08＝0.99＋1.6＝3．直接寫得數(shù)。3.5×0.2＝4.2÷0.3＝12.5×0.08＝2.5－2.04＝5.6÷0.5＝2.5×3.2×4＝3.6÷1.2＝6.6÷11＝4×（2.5＋25）＝4.我能直接寫出得數(shù)！6×0.2＝4.8÷0.6＝0.2÷0.5＝12.4÷4＝2.1÷0.3＝5.6÷7＝2.5×0.8＝0×7.36＝0.6×1.5＝5.直接寫出得數(shù)。42÷0.7＝1.3×0.5＝7.5×0.4＝4.08÷8＝0.21×0.3＝0.9÷0.01＝6.直接寫得數(shù)。8.4÷0.1＝0.12×5＝0.7÷0.7－0.7＝3×0.2×5＝4.6÷23＝0.28÷0.4＝0.125×8＝0.7÷0.7＋0.7＝1÷0.2＝2.5×8＝0.27÷0.09＝（1.6－1.6）÷1.6＝7.直接寫出得數(shù)。二、混合運算（簡便方法運算規(guī)律題型）1、常規(guī)運算100－8.55÷5.73.64×7.5÷0.753.4÷（0.98＋0.72）×7.65（6.8—5.4）×2.75－0.926.5÷2.5×0.48.5×[7.68÷（8.2－1.8）]9.07－22.78÷3.43.4÷（10.2－3.4）×80.4×（3.2－0.8）÷0.1510.64＋7.65×2.4＋9.36（3.2＋0.56）÷0.813.52－[（5.3－4.7）×6.4]26.752－[4.7×（0.54－0.38）＋2.8]7.2÷0.18＋20.8×3.69.8＋0.2×12.42、乘法分配律12.8＋12.8÷423.6×99＋23.67.6－7.6÷1911×1.04－1.044.46×3.5＋3.5×4.54－3.55.1×4.6＋5.9×4.6－4.629.58×101－29.582.75×99＋2.755.97×1.8－0.8×5.973.6－3.6×0.5(12.5+0.125)×81.2×9.7+0.3×1.28.96×0.36＋0.64×8.963.6－3.6×0.5－0.53、乘法結合律0.25×（3.85×40）0.125×5.69×84×3.09×0.254×0.081×2.50.125×7.41×800.7×8×1.25×0.90.125×3.6×817.3×0.25×82.5×12×0.44、除法的性質3.7÷（3.7×25）3.76÷2.5÷478÷0.25÷0.436.7÷1.25÷8800÷2.5÷0.420.5÷1.25÷0.84.8÷0.5÷0.819.9÷0.8÷1.255、拆分法52×47×4945×12509×819×3238×22726÷6969÷8615÷5736÷388÷3136÷66.5×10212.85×10.8103×4.512.5＋0.36÷0.210.1×8710.1×9.99.6×10.19.99×2.22+3.33×3.346、湊整法101×74＋99×130.45×19.80.75×989.9×56.72.34×990.75×994.6×1.02198×0.527、找搭檔法12.5×32×0.252.5×4.456×1.251.25×8.888×0.25×916×12.5×4.312.5×4.8×3.51.08×1.258、特殊計算93×0.54＋4.6×9.30.36×13＋1.3×6.47.2×57＋430×0.7217.6×8