小學四年級下冊數(shù)學小數(shù)乘法練習

小學四年級下冊數(shù)學小數(shù)乘法練習小學四年級下冊數(shù)學小數(shù)乘法練習題一、直接寫得數(shù)3.8×2=10×0.7=13.9×0=508÷100=5.5×1=1.8×0.5=3.2×3=13.1×0.3=0.08×1.25=2.5×4=2.5×8=0.5×0.2=0.6×0.1=0.7×0.8=2.5×8×0=125×0.8=二、豎式計算2.8×0.7=13×0.15=0.39×0.6=0.38×600=7.05×2.4=0.46×7.9=89.3×7.6=60.5×400=三、混合運算12.5×8.2×80.23×1.4＋0.23×8.60.125×（80＋0.8）0.4×0.16×2.55.6×1017.85×991.15×99＋1.1516.2×101－16.24.5×7.8＋5.5×7.8四、一斤香蕉3.8元，一斤蘋果4.2元。強強的媽媽各買回5斤，需要準備多少錢？小學四年級下冊數(shù)學小數(shù)乘法計算練習一、直接寫得數(shù)3.8×2=10×0.7=13.9×0=508÷100=5.5×1=1.8×0.5=3.2×3=13.1×0.3=0.08×1.25=2.5×4=2.5×8=0.5×0.2=0.6×0.1=0.7×0.8=2.5×8×0=125×0.8=二、填空1、8個0.8是()，30個0.25的和是()。2、每千克梨4.8元，小明買了0.25千克，需要()元。3、比較大小1.8×0.991.81.8×0.990.998.5×1.20.85×124、0.7×5表示()。5、8×b，當b()時，積等于8;當b()時，積小于8;當b()時，積大于8。7、根據(jù)算式45.5×3.6=163.8寫出兩個積為16.38的乘法算式①，②。45.5×360＝0.455×360＝8、一個長方形的長是0.8米、寬是0.24米，它的周長是(）米面積是(）。三、小法官1、0.125×6.3×8可以用分配律簡便計算。()2、4.32×0.4的積的小數(shù)位數(shù)一定是兩位。()3、4.25×1.8-1.8=4.25×0()5、兩個數(shù)相乘，積一定比任何一個乘數(shù)大。()6、小數(shù)點后面添上0或去掉0，小數(shù)大小不變。()7、小數(shù)乘法列豎式時，一定要對齊數(shù)位。()四、對號入座。(選擇正確答案的序號填在括號里)1、12.5×9×8=9×(12.5×8)是根據(jù)A、乘法交換律B、乘法結合律C、乘法交換律和結合律2、7.6×10.1=（）A、7.6×10+0.1B、7.6×10+7.6×0.1C、7.6×10+7.6×13、不用計算，下面（）的積最大。A、0.7×80B、0.7×0.8C、0.7×0.084、5.36×2.5的積有（）位小數(shù)。A、3B、2C、1五、豎式計算2.8×0.7=13×0.15=0.39×0.6=0.38×600=7.05×2.4=0.46×7.9=89.3×7.6=60.5×400=3.05×18=0.37×2.31=4.6×18.9=40.5×4.2=混合運算12.5×8.2×80.23×1.4＋0.23×8.60.125×（80＋0.8）0.4×0.16×2.55.6×1017.85×991.15×99＋1.1516.2×101－16.24.5×7.8＋5.5×7.83、脫式計算，能簡便的要簡便計算。2.8+7.2×0.810.34×2.5×0.41.25×11×4×0.88.93×5.7＋8.93×3.3＋8.934.82×1020.7×0.46+0.7×0.54六、解決問題1、汽車每小時行45千米，火車的速度是汽車速度的2.8倍，飛機的速度是火車速度的7.5倍，飛機每小時飛行多少千米?2、修一條水渠，原計劃每天修0.24千米，實際每天比原計劃多修0.06千米，12天后還差0.4千米沒有修，這條水渠長多少千米?3、蘋果每千克3.8元，梨每千克2.9元，媽媽買了3千克蘋果和5千克梨，一共花了多少錢?4、每人每天節(jié)約0.21千克水，50個人4月份能節(jié)約多少千克水？5、叔叔按每千克3,8元的價格批發(fā)了200千克蘋果，按每千克5元賣了120千克之后，剩下的每千克4.5元，賣完后，叔叔能賺多少錢？6、一斤香蕉3.8元，一斤蘋果4.2元。強強的媽媽各買回5斤，需要準備多少錢？博雅學堂四年級數(shù)學小數(shù)乘法練習題題3.8×0.12=0.57×0.6=6.4×0.5=6.7×5.8=9.8×3.8=7.8×6.4=4.6×2.7=4.5×2.7=5×1.6=3×0.6=3×1.2=6.7×7.6=5.4×7.8=2.6×3.6=3.5×1.7=8.3×2.6=1.4×0.7=4.5×2.8=7.4×2.6=6.2×1.4=5.4×2.6=2.3×1.4=3.7×1.8=4.5×2.3=5.2×1.6=3.6×0.8=0.66×1.4=6.5×5.8=0.72×0.49=0.42×0.28=0.24×0.19=2.4×1.3=0.72×0.27=0.78×0.32=0.65×0.04=0.23×0.16=0.29×0.15=0.16×0.19=4×1.2=7×4.6=6×0.37=0.28×0.27=0.75×0.42=2.3×1.9=8×0.64=2.7×0.8=10×4.2=7.1×3.9=4.3×1.4=2.6×1.6=0.8×0.3=0.65×0.4=0.91×0.6=1.8×1.6=4.8×0.5=3.2×0.4=9.8×4.8=12×8.3=15.2×6.5=20.1×11.1=13.34×10.32=6.52×0.48=6.3×5.1=8.7×3.6=14.3×4.3=1.5×0.54=10×4.2=2.47×3.24=2.98×0.56=5.64×1.78=8.02×0.98=7.1×3.9=2.8×11.39=12.53×4.67=7.2×6.45=1.65×3.35=7.96×1.45=60×1.27=6.07×4.89=5×0.41=0.9×0.5=2×0.7=1.2×4.3=5.4×2.7=6×2.9=3.7×1.7=4.2×0.8=7.5×2.5=2.2×4.3=9.5×7.1=3.5×1.6=5.2×2.8=7.8×1.6=9.6×4.1=10×4.2=5.1×2.5=4.1×3.4=1.2×3.8=9.6×4.1=7.8×1.6=3.5×1.6=4.4×1.4=2.9×2.1=3.5×1.2=4.8×3.4=6.9×2.5=2.5×7.8=8×5.4=6.9×2.5=2×3.5=6.8×2.2=4.7×5.4=4.1×8.8=2.2×5.5=9.6×2.1=1.7×3.8=7.4×3.6=0.8×0.23=1.6×2.4=4.7×3.5=1.2×3.6=1.5×3.8=2.8×1.2=7.3×2.7=7.3×2.7=6.2×3.7=4.2×3.9=0.54×0.65=7.5×5.2=0.7×0.5=0.32×0.47=8.3×6.3=7.2×0.42=0.48×0.52=0.8×0.25=43.5×0.65=0.32×0.16=0.35×0.55=0.87×0.8=0.24×0.08=0.92×0.37=1.4×0.6=3.6×4.2=0.72×0.48=6.8×3.2=7.1×3.4=0.42×0.66=0.32×0.68=2.8×7.2=0.65×0.19=3.09×1.2=3.25×5.64=0.25×0.47=0.82×0.18=7.8×2.4=0.45×0.18=0.4×0.16=8.2×1.8=0.73×0.27=8×3.2=9.8×4.8=3×2.4=2.8×0.9=1.29×0.18=5.1×0.8=10×0.3=8.9×4.9=6.8×0.7=8×0.72=6.6×3.4=6.4×1.3=1.2×0.8=7.3×6.2=8.7×3.6=12.3×0.7=0.8×9.2=4.7×1.9=5.1×3.9=1.4×0.6=3.8×6.4=0.6×7.45=4.9×0.1=4.5×3.2=1.8×0.9=6.5×0.5=10.5×6.5=7.5×0.5=0.78×0.28=12.8×2.8=9.6×2.3=3.8×0.12=0.8×0.08=10×7.4=7.5×3.2=0.42×0.58=0.8×0.15=2.5×0.4=8.2×2.6=1.4×0.7=2.5×4.6=0.5×9.8=6.7×2.6=7.2×5.9=8.7×3.6=5.69×2.48=2.9×4.1=9.1×6.7=2.03×1.2=8.6×4.9=1.3×2.03=9.46×7.21=1.56×2.24=3.5×1.25=0.75×0.4=20×0.78=4.8×4.2=5.7×3=4.9×1.7=1.34×0.8=2×0.75=8.7×0.03=0.2×0.09=8.5×2.5=3.4×1.4=0.68×0.42=7.82×7.2=2×9.1=0.48×0.52=8.1×5.1=0.78×0.24=0.8×0.18=0.89×0.25=1×0.98=0.9×0.1=1×0.8=4.5×4=5.6×4=5.7×3.3=10×4.4=6×6.6=9.5×2.7=1×0.55=四年級小數(shù)加減混合運算題25.6-(0.23+5.6)-1.7713.75-(4.75+6.48)7.83+2.34-0.83+6.663.82+2.9+0.18+9.125.48-((9.4-0.52)35.6-1.8-15.6-7.25.93+0.19+2.817.3+2.7-7.3+2.748.4+2.78+51.6-0.7823.4+0.8-13.4-7.24.8+8.63+5.2+0.373.07-0.38-1.621.27+3.9+0.73+15.15.84-1.8-3.2132.44-(58.74+19.44)7.5+4.8-6.53.25+2.76+1.7513.75-(3.75+6.48)7.14-0.53-2.4713.45-4.68+2.5547.8-7.45+8.236.8-4.5+6.9849.8-9.6+8.815.2-6.8-3.451.76+0.65+3.240.134+2.66+0.87.5+4.9-6.33.45+1