北师大版四年级数学下册第三单元小数乘法专项练习题81.docx

北师大版四年级数学下册第三单元小数乘法专项练习题81.docx

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北师大版四年级数学下册第三单元小数乘法专项练习题81

一、口算。

0.2×9＝3×0.4＝0.009×1000＝5.02÷10＝

4.14×100＝0.9×0.06＝0.003×0.5＝0.08×90＝

0.6×5＝4×0.5＝0.09×1000＝0.125÷100＝

37.2×1000＝3×0.7＝0.01×0.2＝0.01×3＝

二、列竖式计算。

4.3×0.074.5×3.47.1×8.99.7×4.99

7.5×0.059.6×0.520.75×0.881.8×18.9

86×0.39.7×0.480.86×2.87.1×7.49

0.17×0.098.1×1.80.36×0.441.37×0.42

一、口算。

0.2×3＝6×0.7＝0.04×100＝0.891÷10＝

5.61×100＝70×0.09＝0.08×2＝0.4×9＝

0.5×6＝9×0.3＝0.04×100＝88.9÷1000＝

0.964×1000＝0.8×0.6＝0.002×0.2＝1.9×0.08＝

二、列竖式计算。

0.21×0.30.81×1.22.3×8.70.95×4.15

0.54×0.052.9×3.10.94×0.191.4×2.16

93×0.032.4×7.99×9.93.1×34.6

7.7×0.36.2×4.48.9×4.827×2.7

一、口算。

0.6×4＝4×0.8＝0.004×1000＝0.383÷100＝

18.6×1000＝0.6×0.3＝0.06×0.04＝0.15×0.03＝

0.9×8＝3×0.8＝0.1×100＝15÷1000＝

8.7×100＝1×0.07＝0.8×5＝0.14×0.04＝

二、列竖式计算。

3.2×0.67.4×4.50.56×0.170.28×14.6

9.3×0.086.5×9.45.5×0.986.1×2.26

9400×0.74.3×6.56.3×0.487.7×6.77

5.2×0.067.6×0.133.9×5.45.43×7.4

一、口算。

0.2×7＝5×0.8＝0.3×1000＝50.1÷10＝

0.857×10＝0.02×0.2＝0.5×600＝0.8×5＝

0.7×8＝3×0.4＝0.5×1000＝5.13÷1000＝

1.6×100＝80×0.03＝0.04×0.02＝1.3×0.7＝

二、列竖式计算。

1.9×0.067.6×8.50.41×9.82.8×1.77

7.4×0.090.32×5.90.36×0.697.3×43.5

35×0.30.12×50.84×2.10.3×54.6

5.3×0.60.15×90.46×1.27.02×9.2

一、口算。

0.1×2＝2×0.9＝0.03×100＝8.36÷1000＝

6.6×10＝0.1×0.09＝0.08×400＝0.07×20＝

0.9×4＝6×0.5＝0.3×100＝0.151÷10＝

9.9×1000＝0.02×0.6＝0.008×900＝0.18×0.2＝

二、列竖式计算。

0.32×0.080.53×0.30.23×5.82.8×46.9

0.61×0.50.94×8.64.5×3.10.39×31.8

5700×0.25.5×3.42×0.170.5×5.77

0.44×0.068.5×0.183.1×6.567.1×0.56

一、口算。

0.6×3＝9×0.7＝0.06×10＝0.08÷100＝

0.38×1000＝3×0.2＝0.009×4＝0.16×0.09＝

0.3×8＝8×0.6＝0.03×10＝0.221÷1000＝

4.91×1000＝0.06×0.5＝0.009×7＝0.5×0.02＝

二、列竖式计算。

6.9×0.099.6×0.720.67×3.70.27×79.5

0.66×0.039.3×1.70.2×0.640.65×9.58

4.1×0.059.2×8.30.37×2.75.7×7.13

3.5×0.090.78×0.462×0.4122.1×6.9

一、口算。

0.4×3＝9×0.6＝0.1×100＝0.77÷100＝

9.11×100＝0.07×0.5＝0.007×40＝0.6×0.05＝

0.2×9＝5×0.6＝0.003×100＝0.45÷10＝

1.56×1000＝50×0.07＝0.05×700＝0.5×500＝

二、列竖式计算。

1.1×0.020.61×5.71×6.69×84.8

7.3×0.064.2×0.340.5×7.80.38×9.3

72×0.42×5.83.5×0.769.1×4.68

6.5×0.56.2×4.45.9×6.987.7×4.3

一、口算。

0.6×4＝4×0.8＝0.004×10＝0.26÷1000＝

44.7×10＝8×0.06＝0.4×0.04＝0.8×2＝

0.2×7＝5×0.7＝0.2×1000＝3.01÷10＝

4.01×1000＝0.09×0.8＝0.6×70＝0.15×800＝

二、列竖式计算。

7.6×0.70.18×0.87.6×1.14.9×4.68

1.2×0.091.1×0.275.8×70.38×17.6

2.2×0.090.54×3.39.4×0.210.57×74

0.93×0.060.64×0.454.8×5.281.8×0.39

一、口算。

0.1×2＝7×0.5＝0.03×10＝1.87÷10＝

15.6×100＝0.2×0.5＝0.007×500＝2×60＝

0.4×6＝3×0.7＝0.6×1000＝94÷1000＝

30.6×1000＝60×0.02＝0.04×0.06＝0.03×0.03＝

二、列竖式计算。

0.56×0.020.89×70.85×4.30.13×5.34

0.16×0.70.44×0.670.9×0.695.2×63.1

390×0.65.8×6.17×0.799.7×9.82

8.3×0.20.54×0.676.5×3.44.39×3.3

一、口算。

0.8×4＝4×0.7＝0.006×100＝10.1÷1000＝

4.26×1000＝40×0.5＝0.2×2＝1.3×90＝

0.6×3＝4×0.6＝0.08×1000＝7.58÷100＝

8.68×10＝9×0.06＝0.006×600＝0.12×5＝

二、列竖式计算。

1.6×0.083.8×0.140.5×0.60.18×5.66

1.6×0.74.7×7.10.13×4.64.1×27.2

11×0.50.72×0.660.7×7.79.7×24.7

0.43×0.085×8.50.88×271.3×9.9

一、口算。

0.2×2＝9×0.2＝0.08×1000＝0.618÷100＝

32.8×1000＝0.7×0.8＝0.05×500＝1.1×6＝

0.1×9＝6×0.7＝0.001×1000＝25.2÷10＝

32.9×100＝0.06×0.03＝0.001×30＝0.01×0.08＝

二、列竖式计算。

0.46×0.72.5×7.20.75×0.140.52×5.08

7.3×0.022.8×9.34.4×4.26.5×2.09

0.53×0.30.87×0.432.9×0.480.76×73.8

2.4×0.030.6×9.53.8×9.28.04×4.2

一、口算。

0.8×9＝3×0.8＝0.06×1000＝0.266÷1000＝

54.4×100＝0.07×0.3＝0.2×200＝1.2×50＝

0.5×3＝9×0.2＝0.01×1000＝0.002÷10＝

2.31×10＝0.02×0.07＝0.8×0.9＝0.02×5＝

二、列竖式计算。

7.8×0.071.2×0.840.43×0.240.85×70.3

0.47×0.90.8×71.2×0.190.83×51.8

0.18×0.80.56×5.14.5×8.70.46×7.34

0.46×0.020.49×6.16.8×5.639.6×0.2

一、口算。

0.3×2＝2×0.5＝0.008×100＝0.51÷100＝

0.131×100＝1×0.3＝0.001×0.9＝0.07×0.8＝

0.7×9＝8×0.9＝0.04×100＝0.222÷10＝

3.7×10＝0.1×0.02＝0.5×0.4＝0.14×30＝

二、列竖式计算。

0.45×0.70.73×2.20.24×6.90.2×58

2.5×0.082.6×0.175.9×0.156.5×5.78

61×0.030.29×9.30.79×1.70.36×8.78

6.9×0.30.24×0.652.5×0.3117.5×0.52

一、口算。

0.7×9＝9×0.7＝0.5×10＝57.4÷100＝

1.22×10＝10×0.6＝0.002×0.8＝0.12×0.04＝

0.2×7＝9×0.6＝0.4×1000＝0.429÷1000＝

4.65×100＝10×0.4＝0.4×0.5＝0.12×3＝

二、列竖式计算。

0.55×0.077.6×60.65×2.10.34×85.9

9.4×0.50.78×5.83.1×0.410.14×4.01

86×0.68.1×0.224.3×9.47.2×9.76

1.7×0.51.3×1.60.66×0.715.81×8.9

一、口算。

0.6×2＝4×0.8＝0.008×1000＝0.35÷1000＝

0.829×1000＝0.3×0.05＝0.007×0.6＝0.15×0.08＝

0.6×9＝4×0.3＝0.9×1000＝0.489÷100＝

60.1×10＝40×0.08＝0.05×50＝1.9×20＝

二、列竖式计算。

0.18×0.067.4×0.656.4×0.545×7.35

0.52×0.020.82×0.941.9×0.112.8×59.5

4900×0.074.5×1.90.67×0.878.6×29.1

0.49×0.50.59×0.748.7×0.651.84×3.2

一、口算。

0.6×8＝4×0.5＝0.03×100＝2.74÷1000＝

44.1×100＝0.07×0.4＝0.005×0.09＝0.2×0.09＝

0.1×7＝8×0.8＝0.04×100＝0.894÷10＝

49.1×10＝0.03×0.8＝0.004×0.06＝0.6×200＝

二、列竖式计算。

0.36×0.86.5×3.40.44×0.699.4×87.5

0.66×0.070.58×0.815.7×0.66.3×25.4

290×0.070.35×4.91.6×1.37.3×35.2

3.9×0.020.7×8.87.5×1.762.1×2.5

一、口算。

0.2×8＝7×0.4＝0.007×1000＝1.52÷10＝

8.34×1000＝2×0.06＝0.04×0.4＝1.3×400＝

0.4×5＝7×0.2＝0.007×100＝0.646÷10＝

6.92×10＝0.03×0.04＝0.006×0.03＝0.6×2＝

二、列竖式计算。

3.3×0.22.4×0.77.9×85.9×2.76

0.59×0.090.7×40.53×0.580.37×1.06

0.45×0.51.6×0.356.1×0.770.37×95.2

0.29×0.40.38×0.390.98×3.641.8×0.87

一、口算。

0.6×9＝4×0.7＝0.009×100＝0.32÷1000＝

5.12×100＝6×0.06＝0.8×20＝0.2×200＝

0.7×9＝4×0.6＝0.8×1000＝26.4÷10＝

3.71×10＝0.01×0.7＝0.005×0.05＝0.09×0.3＝

二、列竖式计算。

0.48×0.56.1×1.50.69×4.64.6×31

1.1×0.070.84×2.40.92×0.90.15×18.2

5.4×0.080.61×0.520.63×8.30.81×83.5

0.85×0.58.3×0.871.1×0.937.41×0.77

一、口算。

0.7×3＝8×0.7＝0.4×1000＝7.99÷10＝

0.894×100＝50×0.04＝0.007×0.4＝0.1×2＝

0.1×5＝3×0.9＝0.007×1000＝87.3÷10＝

3.91×1000＝0.6×0.8＝0.004×0.4＝0.14×0.07＝

二、列竖式计算。

0.62×0.045.2×2.54.4×0.20.18×68.6

2.9×0.060.46×0.661×0.399.6×8.46

0.84×0.040.24×0.420.28×0.678.1×13.7

0.71×0.93.2×1.13.4×7.69.36×1

一、口算。

0.7×5＝9×0.4＝0.004×10＝0.22÷100＝

48.7×1000＝1×0.09＝0.002×0.6＝2×0.7＝

0.1×4＝6×0.9＝0.09×100＝0.693÷10＝

8.59×100＝60×0.02＝0.008×9＝0.08×9＝

二、列竖式计算。

0.13×0.20.43×0.166×0.390.18×84.2

2.6×0.58.8×4.80.38×0.940.18×16.7

1200×0.060.59×0.950.46×8.39.3×3.81

7.2×0.090.4×0.296.2×8.947.7×5

一、口算。

0.1×8＝8×0.5＝0.9×1000＝73.1÷100＝

3.74×10＝5×0.8＝0.001×7＝0.14×400＝

0.6×3＝2×0.6＝0.9×1000＝5.39÷1000＝

29.1×10＝0.8×0.9＝0.005×40＝0.04×0.4＝

二、列竖式计算。

0.67×0.098.5×0.250.84×0.840.32×5.25

0.76×0.080.96×0.525.7×0.327.8×9.51

6.4×0.060.55×60.94×0.83.1×13

0.43×0.44.3×80.48×0.3139.8×2.8

一、口算。

0.1×4＝2×0.4＝0.002×1000＝0.37÷1000＝

44.8×1000＝0.8×0.4＝0.7×80＝0.1×800＝

0.7×4＝7×0.5＝0.4×1000＝7.84÷1000＝

0.48×10＝0.09×0.4＝0.9×0.3＝0.4×3＝

二、列竖式计算。

2.8×0.025.5×7.70.45×8.30.52×43.9

5.1×0.25.9×5.30.65×0.16.6×56.6

260×0.33×0.950.67×1.31.2×5.25

3.7×0.50.2×9.63×0.625.11×4.2

一、口算。

0.4×7＝4×0.6＝0.01×1000＝0.316÷10＝

0.193×100＝0.06×0.4＝0.004×0.09＝0.3×0.02＝

0.6×5＝3×0.3＝0.006×10＝90.4÷10＝

0.09×10＝0.02×0.07＝0.004×40＝0.06×70＝

二、列竖式计算。

5.5×0.44.2×0.860.58×9.37.2×34.4

1.2×0.49.7×7.50.95×0.850.64×57.6

6600×0.024.7×0.980.9×2.41.1×61.1

2.4×0.20.53×0.610.78×7.339.2×0.52

一、口算。

0.4×7＝3×0.5＝0.2×10＝81.1÷100＝

6.84×100＝80×0.9＝0.01×0.08＝0.8×60＝

0.5×4＝9×0.8＝0.006×10＝9.32÷100＝

0.458×100＝0.09×0.9＝0.6×0.02＝0.02×0.08＝

二、列竖式计算。

3.7×0.081.8×0.960.42×