小数乘除法计算题及其答案(6页).doc

-小数乘除法计算题及其答案-第 6 页乘法：5.6×2.9=16.24 3.77×1.8=6.786 0.02×96=1.925.22×0.3=1.566 9.99×0.02=0.1998 4.67×0.9=4.2035×2.44=12.2 1.666×6.1=10.1626 9.432×0.002=0.0188645.6×6.5=36.4 4.88×2.9=14.152 5.61×4.3=24.1238.9×2.4=21.36 5.5×55=302.5 9.77×0.02=0.19541.384×5.1=7.0584 8.78×83=728.74 2.6×61=158.60.059×0.2=0.0118 4.268×1.7=7.2556 57×5.7=324.99.46×2.85=26.961 17.8×6.4=113.92 1.5×4.9=7.352.5×0.88=2.2 5.555×5.2=28.886 2.22×3.33=7.39267.658×85=650.93 36.02×0.3=10.806 56.78×8=454.24除法：85.44÷16=5.34 42.84÷7=6.12 101.7÷9=11.367.5÷15=4.5 230.4÷6=38.4 21.24÷36=0.590.736÷23=0.032 43.5÷12=3.625 35.21÷7=5.0339.6÷24=1.65 6.21÷0.03=207 210÷1.4=15051.3÷0.27=190 91.2÷3.8=24 0.756÷0.18=4.20.66÷0.3=2.2 11.97÷1.5=7.98 69.6÷2.9=2438.4÷0.8=48 15÷0.06=250 （循环小数的用简便方法，除不尽保留2位小数）：8.2÷0.12=68.33 0.8÷0.9=0.88 76.4÷5.4=14.1481484.7÷3=1.566 1.25÷1.2=1.04166 32÷42=0.76190476190414.36÷2.7=5.3185185 8.33÷6.21.34 1.7÷0.03=56.662.41÷0.7=3.44285714285714 计算0.396÷1.2=0.33 0.756÷0.36=2.1 15.6×13=202.80.18×15=2.7 0.025×14=0.35 3.06×36=110.160.04×0.120.0048 3.84×2.610.0（保留一位小数） 5.76×317.287.15×22=157.3 90.75÷3.3=27.5 3.68×0.25=0.9216.9÷0.13=130 1.55÷3.9=0.39743589743589 3.7×0.016=0.059213.76×0.8=11.008 5.2×0.6=3.12 8.4×1.3=10.926.4×0.5=3.2 4.48×0.4=1.792 5.25×5=26.2535.4×4.2=148.68 0.042×0.54=0.02268 0.76×0.32=0.24320.25×0.046=0.0115 2.52×3.4=8.568 1.08×25=270.12×0.5×0.160.0096 4.8×0.251.20.125×1.40.18（保留两位小数） 2.5÷0.73.571（保留三位小数）10.1÷3.3=3.0606（商用循环小数） 10.75÷12.5=0.86（用乘法验算）3.25×9.04= 29.38（用除法验算）3、脱式计算（能简算的要简算）2.5×7.1×4 16.12×9916.12 5.2×0.90.9=（2.5×4）×7.1 =16.12×（99+1） =（5.2+1）×0.9=10×7.1 =16.12×100 =6.2×0.9=71 =1612 =5.587.28×99+7.28 4.3×50×0.2 642.64×0.5=7.28×（99+1） =4.3×（50×0.2） =64-1.32=7.28×100 =4.3×10 =62.68=728 =4326×15.715.7×24 (2.275 0.625)×0.28 =（26+24）×15.7 =2.9×0.28=50×15.7 =0.812=78.53.94+34.3×0.2 1.2×(9.6÷2.4)÷4.8=3.94+6.86 =1.2×4÷4.8=10.8 =4.8÷4.8 =18.9×1.1×4.7 2.7×5.4×3.9 3.6×9.85-5.46=9.79×4.7 =14.58×3.9 =35.46-5.46=46.013 =56.862 =308.05×3.4+7.6 6.58×4.5×0.9 2.8×0.5+1.58=27.37+7.6 =29.61×0.9 =1.4+1.58=34.97 =26.649 =2.98324.90.9 4.84.8×0.5 (1.250.125)×8=36.9-0.9 =4.8-2.4 =1.25×8-0.125×8=36 =2.4 =10-1 =94.8×100.1 56.5×9956.5 7.09×10.80.8×7.09=4.8×100+4.8×0.1 =56.5×（99+1） =7.09×（10.8-0.8）=480+0.48 =56.5×100 =7.09×10=480.48 =5650 =70.94.85 + 0.35 ÷ 1.4 8.7 × 17.4 - 8.7 × 7.4=4.85+0.25 =8.7×10=5.1 =8712.5×0.4×2.5×8 0.87×3.16+4.64 9.5×101 =(12.5×8)×(0.4×2.5) =2.7492+4.64 =9.5×100+9.5=100×1 =7.3892 =950+9.5=100 =959.50.68 ÷（5.2 -3.5）× 1.25 40.5 ÷ 0.81 × 0.18 =0.68÷1.7×1.25 =50×0.18=0.4×1.25 =9=0.54.8 ×（15 ÷ 2.4） 6.81+6.81×99 0.25×185×40 =4.8×6.25 =6.81×(1+99) =(0.25×40)×185=30 =6.81×100 =10×185 =681 =18504.4×0.83.4×0.8 (9.37+937+937+937)× 25 =(4.4-3.4) ×0.8 =(9.37×4) ×2.5=1×0.8 =9.37×(4×2.5)=0.8 =9.37×10 =93.72.37×6.3+2.37×3.7 2.5×1.25×0.32 =2.37×(6.3+3.7) =2.5×1.25×0.4×0.8=2.37×10 =(2.5×0.4) ×(1.25×0.8)=23.7 =1×1 =13.8×10.1 2.5×(3.8×0.04) 7.69×101 =3.8 ×10+3.8×0.1 =2.5×0.04×3.8 =7.69×100+7.69=38.38 =0.38 =776.690.25×39+0.25 0.125×72 46×0.33+54×0.33=0.25×(39+1) =0.125×8×9 =(46+54) ×0.33=0.25×40 =1×9 =100×0.33=10 =9 =33(8×5.27) ×1.25 6.81+6.81×99 0.25×185×40=(8×1.25) ×5.27 =6.81×(1+99) =0.25×40×185=10×5.27 =6.81×100 =10×185=52.7 =681 =18506.8×0.75÷0.5 3.75÷0.1252.75 1.53+23.4÷7.2=5.1÷0.5 =30-2.75 =1.53+3.25=10.2 =27.25 =4.789.5×99 13.5×0.98 12.5×8.8=9.5×(100-1) =13.5×(1-0.02) =12.5×(8+0.8)=9.5×100-9.5 =13.5-13.5×0.02 =12.5×8+12.5×0.8=950-9.5 =13.5-0.27 =100+10=940.5 =13.23 =110