小数乘法简便计算精选一线教师 倾情奉献 61Word文件下载.docx

小数乘法简便计算精选一线教师 倾情奉献 61Word文件下载.docx

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0.54

4.44×

999＋4.440.839×

1001－0.839

2.4×

2.50.46×

98

0.05×

8.17×

0.21.4×

104

0.25×

7.77×

0.48.7×

7.8＋1.3×

7.8

6.9×

0.4＝______×

25×

（0.89×

1.3×

7.7＋8.7×

7.7＝（______＋______）×

0.63×

1.25×

0.81001×

0.77

9.27×

999＋9.270.998×

10001－0.998

4×

0.250.58×

1002

0.5×

3.95×

0.021.2×

1001

7.62×

0.49.8×

4.9＋0.199********9999×

4.9

0.75＝______×

（0.13×

400）＝（______×

8.8＋0.699999999999999×

8.8＝（______＋______）×

0.363×

50×

0.021001×

0.19

9.29×

999＋9.290.536×

11－0.536

1.6×

0.250.28×

3.28×

0.22.1×

102

0.025×

8.65×

4004.9×

1.7＋5.1×

1.7

3.7×

5.65＝______×

（0.46×

3.4×

8.8＋6.6×

0.43×

800101×

0.21

1.52×

99＋1.520.732×

101－0.732

250.33×

101

5.02×

2001.1×

2.5×

6.77×

402.1×

6.3＋7.9×

6.3

2.5＝______×

（0.4×

1.3＋5.7×

1.3＝（______＋______）×

0.82×

0.125×

80999×

0.11

7.41×

99＋7.410.983×

101－0.983

5.6×

2.50.52×

5.63×

2002.3×

8.59×

40.7×

3.8＋9.3×

3.8

9.8×

9.11＝______×

（0.1×

5.8×

6.1＋4.2×

6.1＝（______＋______）×

0.266×

0.299×

0.28

1.13×

9＋1.130.386×

11－0.386

2×

2.50.23×

8.9×

22.5×

2.18×

406.1×

6.7＋3.9×

6.7

8.2×

9.35＝______×

（0.92×

0.4）＝（______×

9.2×

5.3＋0.799999999999999×

5.3＝（______＋______）×

0.059×

8001001×

0.49

8.96×

9999＋8.960.982×

11－0.982

6×

0.250.25×

8.41×

2001.5×

8.16×

0.43.1×

1.8＋6.9×

1.8

0.4×

2.98＝______×

（0.98×

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9.1＋4.5×

9.1＝（______＋______）×

0.762×

0.16

3.53×

9＋3.530.766×

10001－0.766

3.2×

0.250.56×

22.1×

1005

8.13×

400.2×

7.2＋9.8×

7.2