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1、口算專項訓(xùn)練（1）0.4 X4 =2 X2.8 =2.4 X3=2.2 X4 =1.9 X4=6.7 X4 =4.3 XI =6.7 X8 =5.4 X6 =3.4 X8 =3 X5.4 =0.3 X8 =5 X0.8 =0.6 X9=2.3 X3 =3.9 X2 =7.4 X3=7.1 X3 =3 X5.4 =2X4.4 =1.6 X3=3.7 X3=8X4.1 =2.3 X4=1.9 X8 =2.2 X2 =2.3 X8 =8.2 X9 =1.9 X3 =3 X6.6 =0.4 X7 =1.5 X6 =6.3 X4 二6 X4.3 =2 X2.8 =2.4 X3=2.2 X4 =3 X6.

2、6 =3.9 X2 =7.4 X3=7.1 X3 =6.3 X4=7 X2.6 =7.4 XO =2.5 X9 =4.4 X2 =4.5 X6 =2X4.3 =3 X6.7 =3.4 X4 =6X8.1 =1.9 X4 =8X4.3=1.6 X3=3.7 X3=8X4.1 =3 X6.7 =0.3 X8 =0.4 X7 =口算專項訓(xùn)練(3)6.6 X10=7.9 X10=10 X3.3 1 =1 0 X4.6 =10X8.5 =4.2 X100 =1000 X5.4 =10X8.1 =8.98 X100=100 X2.05 =1000 X2.2 =100 X2.8 =2.4 XI 00=2.2

3、 X100 =100 X4.1 =0.3 X10=6.4 X100 =0.5 X100 =0.9100X =0.3 X100 =5.2 X10 =10 X9.72 =10 0 X6.8 =10 X5.66 =68.2 X10 =10.3 X10=5.3 X100 =100 X7.4 =8.8 X10 =4.9 X1000=10 X2.3 =1.67 X 1000 =100 X3.19 =100 X3.8 =6.3 7 X10 = 1000 X0.3 5=2.5 6 X100=0.5 X10 =0.46 10X =2.4 X10 =2.3 1 X10=10 X8.37 =0.1 X10 =51.

4、2 X100 =1.3 X10 =1000 X6.73 =8.87 X100=1000 X5.2 =10X0.22 =100 X2.6 =7.4 X10 =100 X3.2 =9.9 X1000 =100X4.1 =10 X4.38 =13.4 X10=20.6 XI 00=100 X10.8 =10X4.52 =1000 X5.41 =小數(shù)乘整數(shù)(3)口算專項訓(xùn)練（7）2.4 XI 00=1000 X0.3 5=2.5 6 X100=2.2 X100 =9.5 X100 =100 X6.93 =1.3 X10 =1000 X6.73=2.54 1000X =2.25 1000X =100X8

5、.35 =10 X8.64 =4.36 X 100 =3.2 X5=8.4 X2 =100X8.2 7=1000 X5.4 =10X8.1 =2.8 X30=100 X3.19 =10 X4.38 =13.4 X10=100 X3.8 =100X6.76 =9.2 X100 =1000 X5.4 =1.46 100X =3.76 100X =100X4.15 =10 X8.38 =10X8.9 =1.25 8=X7.2 X6 二10 X6.48 =4.31 X8=5.3 X100 =100 X7.4 =8.3 X2 =0.3 X10=6.4 X100 =100 X3.2 =9.9 X1000

6、=5.5 X10 =10.3 X10=5.3 X100 =27.4 100X =7.17 1000X =8.3 X5 =7.8 10X 0=7.4 X100 =0.25 4=X4 X6.1 =5.1 3 X100=8.22 X3 =1000 X6.73=8.87 X100=7.5 X2 0=3.76 100X = 1.25 8=X7.2 X6= 100X4.6 = 14.1 X4= 44.2 X100=4.3 6 X10 = 10X0.22 = 100 X2.6 =7.4 X10 =2 X2.8 =2.4 X3=2.5 X4 = 100X6.6 =0.4 X7 = 100X6.76 = 9.2

7、 X100 = 0X5.6 =7.17 1000X =0.25 4=X1000 X6.82 =0X5.6 =7 X2.1 =100X8.05 =100X8.35 =1000 X2.2 =100 X2.8 =2.4 XI 00=1.6 8 10=X0.7 10=X8X4.1 =3 X6.7 =8.4 X2 =5.5 X10 =5.2 6 X10 =58.1 X100 =2.25 1000X =3.2 X5 =100 X8.3 =58.1 X100 =100X5.3 =100 X8.2 =4.9 X1000=10 X2.3 =1.67 X1000 =3.9 X2 =7.45 X100=7.1 X1

8、00 =3 X5.4 =0.3 X8 =9.5 X100 =100 X6.93 =2.5 X100 =14.1 X4=7 X2.1 =100X5.3 =44.2 X100=口算專項訓(xùn)練（#）8.4 X2 =5.5 X10 =5.2 X10 =7.5 3X =100X8.05 =6.6 X10=0.92 X3 =10 X3.3 =4.1 X5=10 X8.38 =10 X8.38 =6 X4.2 2=2.5 X100 =8.9 X2 =10X4.72 =7.5 X2 =2.5 X100=7.4 X100 =7.2 4 X 100 =9.5 X100 =100 X6.93 =2.5 X100 =7

9、.4 X4 =100X8.2 =5.2 X100 =0.17 X2 =3.2 X5=4.3 4 X2 =4.31 X8=7.81 X100 =8X4.3=3.2 X4=3.2 X10=8.8 X10 =9.22 X100 =100 X7.2 =7.4 X100 =100X6.76 =9.2 X100 =8.8 X7=1.3 4 X8 =100X9.2 =0.4 X6 =2.3 100X =5.1 X5=8.2 X100 =8.22 X3 =2.33 X4=4 X4.4 1 =8 X4.2=8.8 3 X100=8.9 X10=5.2 X10 =7.5 X10 =口算專項訓(xùn)練（9）4X0.25=

10、0.5 X100=8.5 X100=3.9 X20=1.5 X8=2.5 X8=1.9 X40=2.5 X2=2.1 X2=3.08 X0.01 =0.4 X0.5=0.4 X20=1.32 X8 =0.9 X0.3 =0.13 X7 =12.5 X8 =2.3 X4 =0.45 X0.2 =9X0.5 =4.1 X2 =0.8 X0.5 =60X0.5=0.78 X0.2=0.8 X0.9=3.6 X0.2=7.25 X4=3.6 X5=0.6 X8=4.5 X2=6.9 X0.1 =0.7 X0.8 =0.7 X8 =3.5 X0.2 =10X0.05 =0.05 X4 =3.25 X0

11、=7.5 X0.1 =3.5 X0.01 =3.9 X0.3 =1.25 X8 =0.5 Xl.l =0.2 X0.5=30X0.5=0.5 X0.28=1.5 X5 =4X0.25=3.4 X0.7=0.5 X10=5.6 X100=4.95 X1000=2.8 X10=0.8 X7 =10.3 X2 =5X0.6 =0.7 X4 =0.4 X50 =2.6 X3 =4.1 X2 =0X9.8 =2.6 X3 =7.5 X0.1 =1X0.06 =0.9 X0.3 =口算專項訓(xùn)練（11）9X0.5=8.2 X0.8=0.9 X0.2 =30X0.1 =4.8 X0.5=1.25 X8=7.8

12、 X0.5=6.8 X0.4=8.1 X5=0.8 X0.5=0X0.54=0.125 X8 =0.18 X10 =32X2.5 =1.25 X8 =2.5 X0.4 =1.4 X0.5=0.36 X10=1.5 X0.8=7.8 X5=0.4 X25 =0.22 X4=4X0.3=1X0.08=2.4 X5=3.4 X0.4=100 X0.8=0.7 X40=1X0.98=0.125 X8=1.25 X8 =2.5 X0.4 =1.8 X0.5=4X0.25=0.8 X12.5=0.1 X0.02=2.4 X5=2.5 X0.04=6.5 X20=0.125 X6=2.5 X0.4=0.2

13、X0.4=3.99 Xl =0.5 X0.2=2.01 X0=0.21 X100=2.9 X9=0.8 X0.1 =0.8 X0.25=0.5 X40=4X0.25=0.8 X12.5=0.1 X0.02=0X0.54=0.125 X8 =0.18 X10 =32X2.5 =3.14 X100=3.6 X500=0.008 X1000 =72X0.4=1.5 X0.5=10.1 X30=口算專項訓(xùn)練（13）0.8 X7 =1.5 X7 =0.9 X0.3 =0.13 X7 =12.5 X8 =2.3 X4 =0.45 X0.2 =9X0.5 =4.1 X2 =7.5 X0.1 =9X0.5=8

14、.2 X0.8=0.9 X0.52=30X0.1 =4.8 X5=1.25 X8=7.8 X0.2 =6.8 X0.4=8.1 X5=0.7 X8 =10.3 X2 =5X0.6 =0.7 X4 =0.4 X50 =2.6 X3 =4.1 X2 =0X9.8 =2.6 X3 =1X0.06 =2.5 X0.4=0.2 X0.4=3.99 Xl =0.35 X0.2=2.01 X0=0.21 X100=2.19 X0.1 =0.8 X0.18=0.89 X5 =1.32 X8 =3.5 X0.2 =10X0.05 =0.05 X4 =3.25 X0 =7.5 X0.1 =3.5 X0.01 =3

15、.9 X2 =1.25 X8 =0.9 X0.3 =10X3.52=0.22 X4=4X0.3=1X0.08=2.4 X5=3.4 X0.4=10X0.89=0.72 X4=0.1 X0.98=8X0.52=0.5 X40=0.125 X8=7X0.08=1.87 X0=0.24 X5=口算專項訓(xùn)練（15）0.02 X0.5=5.6 X100=4.8 X0.3=0.36 X4=3.6 X4=4.6 X3=12.5 X4=2.4 X5=3.08 X0.01 =0.4 X0.5=9.6 X0.8=9.5 X0.6=0. 56 OX.7=3.9 X3=0.25 X0.4=1.25 X0.8= 0.2

16、2 X100=4.5 X0.5= 5X0.12= 4X4.2=6.3 X0.7=0.125 X8=0.56 X2=0.7 X9=7.2 X0.8=5.2 X3 = 10X2.22= 0.35 X0.6=6.9 X0.1 =1.8 X9=4.95 X0.1 =2.5 X8=3.28 X0.1 =0.01 X0.1 =0.8 X2.5=0X1.7 =5X0.24=16.5 X5=4.8 X0.5=5X0.25=3.6 X0.3=0.75 X0.6=0.86 X2=0.64 X8=0.8 XI.1 =2.8 X4=1.64 X0.1 =8.65 X10=4.95 X1000=2.4 X0.8=0.1

17、08 X2=0.325 X 100=0.125 X4=7.2 X0.1 =1.6 X0.8=3.2 X0.4=5.6 X0.8=3.9 X0.324X0.5=0.84 X2=口算專項訓(xùn)練（17）4.1 X2 =7.5 X0.1 =9X0.5=8.2 X0.8=0.9 X0.2 =30X0.1 =4.8 X0.5=1.25 X8=7.8 X0.5=6.8 X0.4=8.1 X5=0.8 X0.5 =0.9 X0.3 =0.13 X7 =12.5 X8 =2.3 X4 =0.45 X0.2 =9X0.5 =4.1 X2 =7.5 X0.1 =2.6 X3 =1X0.06 =2.5 X0.4=0.2

18、 X0.4=3.99 Xl =0.5 X0.2 =2.01 X0=0.21 X100=2.9 X9=0.8 X0.1 =0.8 X 0.25=0.5 X40=5X0.6 =0.7 X4 =0.4 X50 =2.6 X3 =4.1 X2 =0X9.8 =2.6 X3 =1X0.06 =1.25 X8 =0.9 X0.3 =0.4 X25 =0.22 X4=4X0.3=1X0.08=2.4 X5=3.4 X0.4=100 X0.8=0.7 X40=1X0.98=0.125 X8=10X0.05 =0.05 X4 =3.25 X0 =7.5 X0.1 =3.5 X0.01 =3.9 X2 =1.25

19、 X8 =0.9 X0.3 =9X0.5=2.5 X0.4=10X3.52=口算專項訓(xùn)練（19）3.6 +0.1二0.45 +0.09 二0.2 -0.01 =2.5 一5 二1.8 +0.9二10.1 二844.2=0.36 93二8.5 口.7二0.49 0.7=4.8 4-4 =24 2 二 0.024 4-2=28 7 二2.8 4-0.7=36 3 二3.6 4-0.3=484-12=4.8 4-1.2=3.2 +10=4 4-0.4=27+0.1 二15+0.5二0.45 -0.15=5.4 4-10=52.5=0.12 4-0.03=5.6 7 二0.81 4-0.9=0.48

20、+4 =2.4 4-2=244-4=2.8 5=28+0.7二3.6 3 二364-0.3=4.8 4-12=0.48 +0.12 二9.3 4-0.3=0.45 4-0.5=7.2 4-0.9=12 二00.25=28.6 2100二2.4 -0.6=2.8 4-0.4=1.2 0.3 =54 + 6 =0.48 ：0.4 二0.24 2 二2.4 4-4=0.28 7 二284-0.07=0.36 3 二0.36 4-0.03=0.48 +12二0.48 4-0.2=46 23 二4.6 4-23=0.46 4-2.3=口算專項訓(xùn)練（25）462.3=0.3 4-6=0.3 -0.6=80

21、.2=0.36 +9 二8.4 4-4=30+0.3二7 4-3.5=1.6 0.8=164 二0 2.3二1.5 -0.1 =0.2 4-1 =12-4 二5.4 4-6=3.6 0,18=4.8 4-12=7.5 4-15=72+0.8 二4.6 4-2.3=30 6 二3 4-0.6=8 2 =0.8 +0.2 二4.5 4-5=2 5 二104-2.5=0+4.3二0.48 0.24=0.25 -0.5=3.5 4-1 =2.9 4-0.1 =10.2 二7.2 -0.9=5.4 3 二6.3 4-0.3=6.4 4-0.8=0.25 +0.05 二0.46 +0.23 二3 4-6=

22、304-0.6=0.8 2 二80+0.2 二1.3 +10=6.6 4-22=0.9 10 二0.25 +1二184-0.9=5.1 +1.7 二7 4-0.1 =14-0.5 =9.9 +3.3二3.6 2 二0.36 +1.8 二0.25 4-5=5.5 4-11 =6.3 :0.9 二0.3 -0.5=1.8 4-3=1.2 6 二6.3 4-7=1.5 4-0.5 =1.3 +0.13 二2.1 +0.3二0.28 口.4 =10 25 =0.42 97二0.9 4-4.5 =4.8 口.6 =2.9 4-10=9.6 +16 =6.4 4-4 =1.2 +0.4二0.5 4-0.5 =7.82 +0.1 =4.5 4-5=1.6 -0.8=0.14 4-0.7=4.5 0.5二9.9 -0.3=20 5 二0.02 -0.4=0.12 +0.04 二4 4-0.5 =3.52 +1 =0.42 4-0.6=5.1 +0.17 =8.4 4-0.4 =1.5 :0.03 二30.5 =7.2 +0.9 =3.6 +0.

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