1、口算專項訓練（1）0.4×4 =2×4.4 =3.9×2 =2 ×2.8 =1.6×3=7.4×3=2.4×3=3.7×3=7.1×3 =2.2×4 =8×4.1 =6.3×4=1.9×4=2.3×4=7 ×2.6 =6.7×4 =1.9×8 =7.4×0 =4.3×1 =2.2×2 =2.5×9 =6.7×8 =2.3 ×8 =4.4×2 =5.4

2、5;6 =8.2×9 =4.5 ×6 =3.4×8 =1.9×3 =2×4.3 =3 ×5.4 =3×6.6 =3 ×6.7 =0.3×8 =0.4×7 =3.4×4 =5 ×0.8 =1.5×6 =6×8.1 =0.6×9=6.3×4=1.9×4 =2.3×3 =6×4.3 =8×4.3=3.9×2 =2×2.8 =1.6×3=7.4×3=2.4×

3、;3=3.7×3=7.1×3 =2.2×4 =8×4.1 =3 ×5.4 =3×6.6 =3 ×6.7 =0.3×8 =0.4×7 =口算專項訓練（2）0.3×100 =0.4610× =6.6×10=5.2×10 =2.4×10 =7.9×10=10×9.72 =2.3 1×10=10×3.3 1=10 0×6.8 =10 ×8.37 =1 0×4.6 =10×5.66 =0

4、.1×10 =10×8.5 =68.2×10 =51.2×100 =4.2×100 =10.3×10=1.3×10 =1000×5.4 =5.3×100 =1000×6.73=10×8.1 =100×7.4 =8.87×100=8.98×100=8.8×10 =1000×5.2 =100×2.05 =4.9×1000=10×0.22 =1000×2.2 =10×2.3 =100×

5、;2.6 =100×2.8 =1.67×1000 =7.4×10 =2.4×1 00=100×3.19 =100×3.2 =2.2×100 =100×3.8 =9.9×1000 =100×4.1 =6.3 7×10 =100×4.1 =0.3×10=1000×0.3 5=10 ×4.38 =6.4×100 =2.5 6×100=13.4×10=0.5×100 =0.5×10 =20.6 ×

6、;1 00=0.9100× =100×10.8 =10×4.52 =1000×5.41 =小數(shù)乘整數(shù) (3)口算專項訓練（3）2.4×1 00=100×3.19 =0.3×10=1000×0.3 5=10 ×4.38 =6.4×100 =2.5 6×100=13.4×10=100×3.2 =2.2×100 =100×3.8 =9.9×1000 =9.5×100 =100×6.76 =5.5×10 =100&

7、#215;6.93 =9.2×100 =10.3×10=1.3×10 =1000×5.4 =5.3×100 =1000×6.73=1.46100× =27.4100× =2.541000×=3.76100× =7.171000× =2.251000×=100×4.15 =8.3×5 =100×8.35 =10 ×8.38 =7.810× 0=10 ×8.64 =10×8.9 =7.4×100 =4

8、.36×100 =1.258=×0.254=×3.2×5=7.2×6=4 ×6.1 =8.4×2 =10 ×6.48 =5.1 3×100=100×8.2 7=4.31×8=8.22×3 =1000×5.4 =5.3×100 =1000×6.73=10×8.1 =100×7.4 =8.87×100=2.8×30=8.3×2 =7.5×2 0=7.9×2 =6.6×4

9、=4 ×5.5 =口算專項訓練（4）3.76100× =7.171000× =2.251000× =1.258=×0.254=×3.2×5=7.2×6=1000×6.82 =100×8.3 =100×4.6 =0×5.6 =58.1×100 =14.1×4=7 ×2.1 =100×5.3 =44.2×100=100×8.05 =100×8.2 =4.3 6×10 =100×8.35 =4

10、.9×1000=10×0.22 =1000×2.2 =10 ×2.3 =100×2.6 =100×2.8 =1.67×1000 =7.4×10 =2.4 ×1 00=3.9×2 =2 ×2.8 =1.6 810=×7.45×100=2.4×3=0.710=×7.1×100 =2.2 ×4 =8×4.1 =3 ×5.4 =100×6.6 =3 ×6.7 =0.3×8 =0.4 &

11、#215;7 =8.4 ×2 =9.5×100 =100×6.76 =5.5×10 =100×6.93 =9.2×100 =5.2 6×10 =2.5×100 =0×5.6 =58.1×100 =14.1×4=7 ×2.1 =100×5.3 =44.2×100=口算專項訓練（5）7.2 4×100 =7.4×100 =8.4 ×2 =9.5×100 =100×6.76 =5.5×10 =100&#

12、215;6.93 =9.2×100 =5.2×10 =2.5×100 =8.8×7=7.53×=7.4×4 =1.3 4×8 =100×8.05 =100×8.2 =100×9.2 =6.6×10=5.2×100 =0.4×6 =0.92 ×3=0.17 ×2 =2.3100× =10×3.3=3.2×5=5.1×5=4.1×5=4.3 4×2 =8.2×100 =10

13、5;8.38 =4.31×8=8.22 ×3 =10×8.38 =7.81×100 =2.33×4=6 ×4.2 2=8×4.3=4×4.4 1=2.5×100 =3.2×4=8×4.2=8.9×2 =3.2×10=8.8 3×100=10×4.72 =8.8×10 =8.3×10=7.5×2 =9.22×100 =5.2×10 =2.5×100=100×7.2 =7.5

14、15;10 =7.4×100 =口算專項訓練（6）4×0.25=0.5×1.1=0.8×0.5=0.5×100=0.2 ×0.5=60×0.5=8.5×100=30×0.5=0.78×0.2=3.9×20=0.5×0.28=0.8×0.9=1.5×8=1.5×5=3.6×0.2=2.5×8=4×0.25=7.25×4=1.9×40=3.4 ×0.7=3.6 ×5=2.5

15、5;2=0.5×10=0.6×8=2.1×2=5.6 ×100=4.5×2=3.08×0.01=4.95 ×1000=6.9×0.1=0.4×0.5=2.8 ×10=0.7 ×0.8=0.4×20=0.8 ×70.7×81.32×810.3 ×23.5×0.20.9×0.35×0.610×0.050.13×70.7×40.05×412.5×80.4×

16、;503.25×02.3×42.6×37.5×0.10.45×0.24.1×23.5×0.019×0.50×9.83.9×0.34.1 ×22.6 ×31.25 ×87.5×0.11×0.060.9×0.3口算專項訓練（7）9×0.5=2.5×0.4=0.4×258.2×0.8=0.2×0.4=0.22 ×4=0.9×0.2=3.99 ×1=4×0

17、.3=30×0.1=0.5×0.2=1×0.08=4.8×0.5=2.01 ×0=2.4×5=1.25×8=0.21 ×100=3.4×0.4=7.8×0.5=2.9×9=100×0.8=6.8×0.4=0.8×0.1=0.7×40=8.1×5=0.8×0.25=1×0.98=0.8×0.5=0.5×40=0.125 ×8=0×0.54=4×0.25=1.25 

18、15;8 =0.125 ×80.8 ×12.5=2.5×0.40.18×100.1 ×0.02=1.8×0.5=32×2.50×0.54=4×0.25=1.25×8 =0.125 ×80.8×12.5=2.5×0.40.18 ×100.1×0.02=1.4×0.5=32×2.52.4×5=0.36×10=3.14 ×100=2.5×0.04=1.5×0.8=3.6 ×

19、500=6.5 ×20=7.8×5=0.008 ×10000.125 ×6=72×0.4=1.5 ×0.5=10.1 ×30=口算專項訓練（8）0.8 ×70.7 ×81.32 ×81.5×710.3×23.5×0.20.9×0.35×0.610×0.050.13 ×70.7×40.05 ×412.5 ×80.4×503.25 ×02.3×42.6×37.5

20、×0.10.45 ×0.24.1×23.5×0.019×0.50×9.83.9×24.1 ×22.6 ×31.25 ×87.5×0.11×0.060.9×0.39×0.5=2.5×0.4=10×3.52=8.2×0.8=0.2×0.4=0.22 ×4=0.9×0.52=3.99×1=4×0.3=30×0.1=0.35×0.2=1×0.08=4.8&

21、#215;5=2.01×0=2.4×5=1.25 ×8=0.21×100=3.4×0.4=7.8×0.2=2.19×0.1=10×0.89=6.8×0.4=0.8×0.18=0.72 ×4=8.1×5=0.89×5=0.1×0.98=8×0.52=0.5×40=0.125 ×8=7×0.08=1.87 ×0=0.24 ×5=口算專項訓練（9）0.02×0.5=3.6×0.3=6

22、.3 ×0.7=5.6×100=0.75×0.6=0.125 ×8=4.8×0.3=0.86 ×2=0.56×2=0.36×4=0.64×8=0.7 ×9=3.6×4=0.8 ×1.1=7.2 ×0.8=4.6×3=2.8×4=5.2×3=12.5×4=1.64×0.1=10×2.22=2.4×5=8.65×10=0.35×0.6=3.08×0.01=4.95 

23、15;1000=6.9 ×0.1=0.4×0.5=2.4×0.8=1.8×9=9.6×0.8=0.108 ×2=4.95×0.1=9.5×0.6=0.325 ×100=2.5×8=0. 560×.7=0.125 ×4=3.28 ×0.1=3.9×3=7.2×0.1=0.01×0.1=0.25×0.4=1.6×0.8=0.8 ×2.5=1.25×0.8=3.2×0.4=0×1.7

24、=0.22×100=5.6×0.8=5×0.24=4.5×0.5=3.9×0.316.5 ×5=5×0.12=24×0.5=4.8 ×0.5=4×4.2=0.84×2=5×0.25=口算專項訓練（10）4.1 ×22.6 ×31.25 ×87.5×0.11×0.060.9×0.39×0.5=2.5×0.4=0.4×258.2×0.8=0.2×0.4=0.22 

25、5;4=0.9×0.2=3.99 ×1=4×0.3=30×0.1=0.5×0.2=1×0.08=4.8×0.5=2.01 ×0=2.4×5=1.25 ×8=0.21 ×100=3.4×0.4=7.8×0.5=2.9×9=100×0.8=6.8×0.4=0.8×0.1=0.7×40=8.1×5=0.8×0.25=1×0.98=0.8×0.5=0.5×40=0.125 &

26、#215;8=0.9×0.35×0.610×0.050.13 ×70.7×40.05 ×412.5 ×80.4×503.25 ×02.3×42.6×37.5×0.10.45 ×0.24.1×23.5×0.019×0.50×9.83.9×24.1 ×22.6 ×31.25 ×87.5×0.11×0.060.9×0.39×0.5=2.5×0.

27、4=10×3.52=口算專項訓練（11）3.6 ÷0.1=3.2÷10=9.3÷0.3=0.45 ÷0.09=4÷0.4=0.45÷0.5=0.2÷0.01=27÷0.1=7.2÷0.9=2.5÷5=15÷0.5=1÷2=1.8÷0.9=0.45÷0.15=0÷0.25=1÷0.1=5.4÷10=28.6÷100=84÷4.2=5÷2.5=2.4÷0.6=0.36 ÷

28、3=0.12÷0.03=2.8÷0.4=8.5÷1.7=5.6÷7=1.2÷0.3 =0.49 ÷0.7=0.81÷0.9=54÷64.8÷40.48÷40.48÷0.424÷2=2.4÷2=0.24÷2=0.024 ÷2=24÷4=2.4÷4=28÷7=2.8÷7=0.28÷7=2.8÷0.7=28÷0.7=28÷0.07=36÷3=3.6÷3=

29、0.36÷3=3.6÷0.3=36÷0.3=0.36÷0.03=48÷12=4.8÷12=0.48÷12=4.8÷1.2=0.48÷0.12=0.48÷0.2=46÷23=4.6÷23=0.46÷2.3=口算專項訓練（12）4.6÷2.3=0.46÷0.23=46÷2.3=30÷6=3÷6=0.3÷6=3÷0.6=30÷0.6=0.3÷0.6=8÷2=0.8÷

30、;2=8÷0.2=0.8÷0.2=80÷0.2=0.36 ÷9=4.5÷5=1.3÷10=8.4÷4=2÷5=6.6÷22=30÷0.3=10÷2.5=0.9÷10=7÷3.5=0÷4.3=0.25÷1=1.6÷0.8=0.48 ÷0.24=18÷0.9=16÷4=0.25 ÷0.5=5.1÷1.7=0÷2.3=3.5÷1=7÷0.1=1.5÷0.

31、1=2.9÷0.1=1÷0.5=0.2÷1=1÷0.2=9.9÷3.3=12÷4=7.2÷0.9=3.6÷2=5.4÷6=5.4÷3=0.36÷1.8=3.6÷0.18=6.3÷0.3=0.25÷5=4.8÷12=6.4÷0.8=5.5÷11=7.5÷15=0.25 ÷0.05=6.3÷0.9=72÷0.8=54÷0.6=0.49÷0.7=0.24 ÷0.6

32、=口算專項訓練（13）0.3÷0.5=1.6÷0.8=5.6÷0.07=1.8÷3=0.14÷0.7=0÷5.32=1.2÷6=4.5÷0.5=3.4÷0.01=6.3÷7=9.9÷0.3=10÷4=1.5÷0.5=20÷5=6.6÷0.1=1.3÷0.13=0.02÷0.4=5.03 ÷0.01=2.1÷0.3=0.12÷0.04=2.8÷0.70.28 ÷1.44÷0.57.5÷1.510÷253.52÷11.5÷0.30.42 ÷7=0.42 ÷0.6=0.48 ÷0.80.9÷4.