五上口算练习.docx

1、五上口算练习1 月 日 小数乘整数，不进位0.53 =1.42 =0.421 =0.36 =80.8 =1.33 =4.12 =3.42 =0.611 =1.23 =0.156 =32.3 = 1.15 =41.2 =50.5 =我发现：2 月 日 小数乘整数，进位1.53 =1.44 =0.612 =0.136 =81.2 =1.63 =4.62 =3.44 =0.613 =1.27 =0.256 =42.3 = 1.55 =41.7 =31.4 =我发现：3 月 日 小数乘整数，末尾去00.54 =0.85 =1.45 =5.54 =7.52 =3.25 =4.45 =0.25 =1.54

2、 =1.65 =4.52 =2.45 = 3.56 =51.2 =50.6 =我发现：4 月 日 小数乘小数0.42.6 =5.30.2 =3.10.7 =2.50.5 =7.40.2 =0.34.3 =1.20.9 =7.50.5 =2.10.6 =6.20.4 =4.10.9 =5.80.2 =2.40.7 =3.10.5 =2.50.5 =我发现：5 月 日 小数乘小数，前面补00.51.3 =0.20.2 =2.50.2 =3.50.1 =4.20.2 =1.30.3 =0.30.2 =0.81.2 =0.061.1 =0.180.2 =0.32.5 =3.40.2 = 1.10.5

3、=0.71.2 =0.50.0 =我发现：6 月 日 小数乘小数末尾去掉01.20.5 =0.42.5 =0.52.6 =4.50.4 =3.60.5 =1.50.6 =2.80.5 =5.50.4 =0.51.6 =0.50.8 =0.51.4 =0.22.5 =3.50.2 =4.20.5 =0.380.5 =我发现：7 月 日 小数乘法简算口算0.2574 =40.50.7 =0.50.82=12.53.78 =1.2583 =1.27+1.87=95.6+4.49 =1.4990.6 =5.62.40.62.4=1.8101-1.8 =0.2475 =1.546 = 0.1574 =0

4、.41.25 =52.42 =我发现：8 月 日 小数乘法口算规律30.5 =1.40.5 =0.40.5 =0.90.5 =3.20.5 =0.50.1 =0.12 =140.01 =0.30.01 =1.80.001=40.25=1.258 =0.825 =0.2512 =0.80.125 =我发现：9 月 日 小数乘法混合口算30.30.3 =2.92 =3.40.5 =0.244 =1.70.2 =1.33 =0.024.1 =3.40.6 =1.251.18 =1.23 =0.156 =32.3 = 110.5-0.5 =4-1.2 =50.5 =我发现：10 月 日 小数乘法混合口

5、算1.53 =1.40.01 =0.612 =0.136 =81.2 =1.63 =4.6225.4 =3.44 =0.60.013 =71.2 =0.256 =42.3 = 1.50.1 =41.72.5=31.4 =我发现：11 月 日 除数是整数的小数除法，可除尽2.82 =6.63 =2.62 =4.84 =10.55 =8.42 =5.55 =20.55 =21.63 =20.55 =10.42 =9.33 = 16.88 =6.82 =12.84 =我发现：12 月 日 除数是整数的小数除法，可除尽3.22 =7.55 =6.55 =5.42 =9.22 =25.55 =2.42

6、=5.55 =8.55 =36.66 =9.55=27.99 =7.22 =81.99 =762 =我发现：13 月 日 除数是整数的小数除法，添0继续除32 =75 =65 =52 =92 =215 =2.52 =5.35 =85 =156 =95=145 =132 =185 =72 =我发现：14 月 日 除数是整数的小数除法，添0继续除428 =128 =215 =515 =65 =74 =645 =492=48 =172 =424 =215 =2.72=5.65 =4.12 =我发现：15 月 日 除数是整数的小数除法，整数部分商05.68 =3.28 =3.57=4.86 =7.29

7、 =6.488 =1.555 =8.129=7.525 =4.824 =2.884 =2.763 =4.97=4.555 =3.216 =我发现：16 月 日 除数是整数的小数除法4.055 =7.212 =2.48=9.616 =7.55 =13.55 =13.55 =2.17=5.82 =0.813 =4.977 =384 =8.19=10.89 =4.082 =我发现：17 月 日 除数是整数的小数除法，商中间有00.950 =7.83 =0.639=5.49 =3.55 =2.55 =12.44 =8.47=8.10.9 =2.522 =9.279 =3.153 =2.122=8.32

8、8 =5.455 =我发现：18 月 日 除数是整数的小数除法3.420 =1.25 =0.637=0.3417 =14.62 =4.848 =0.422 =1.128=6.044 =7.82 =4.244 =2.463 =5.49=24.93 =4.164 =我发现：19 月 日 一个数除以小数，被除数、除数小数位数一样多，除尽0.90.3 =7.80.3 =0.630.09=5.40.9 =1.60.2 =2.50.5 =4.81.2 =8.40.7=8.10.9 =3.40.2 =12.60.6 =3.61.2 =2.40.8=0.390.13 =5.50.5 =我发现：20 月 日 一

9、个数除以小数，被除数、除数小数位数一样多，添01.30.5 =4.20.4 =1.50.6=0.440.8 =3.60.5 =2.60.4 =1.20.5 =4.90.2=0.30.6 =0.10.2 =0.10.4 =0.40.5 =0.10.2=4.50.6 =0.70.5 =我发现：21 月 日 一个数除以小数，被除数、除数小数位数一样多，混合0.20.4 =1.80.4 =1.50.3=1.90.5 =1.50.2 =0.120.06 =0.180.06 =0.140.04=0.060.08 =0.220.05 =0.0060.002 =0.0250.001 =0.0290.005=0

10、.0210.007 =0.0380.019 =我发现：22 月 日 一个数除以小数，被除数小数位数大于除数3.930.3 =2.460.5 =8.050.5=3.660.6 =3.640.4 =1.550.5 =0.960.2 =0.250.5=0.743.7 =2.420.2 =990.9 =480.6 =562.8=360.9 =320.8 =我发现：23 月 日 一个数除以小数，被除数小数位数大于除数4.550.5=0.810.3 =0.420.2=1.080.3 =0.560.2 =0.480.6 =3.360.3 =10.04=4.590.9 =0.810.9 =0.490.7 =3

11、.150.3 =0.360.9=10.125 =1.030.5 =我发现：24 月 日 一个数除以小数，被除数小数位数小于除数0.80.04 =3.90.13 =3.80.02 =3.20.08 =5.60.04=10.02 =50.05 =130.02=40.05 =50.02 =3.90.03 =6.60.33 =2.20.11=5.10.17 =6.30.09 =我发现：25 月 日 小数除法口算规律0.90.5 =7.80.5 =0.630.5=5.40.5 =3.50.5=2.50.1 =12.40.1 =8.40.1=8.10.1 =2.520.1 =50.01 =1.20.01

12、=2.120.01=83.20.01 =540.01 =我发现：26 月 日 小数除法口算规律0.10.2 =2.60.2 =1.30.2=3.80.2 =3.50.2 =0.10.25=3.20.25 =200.25=1.60.25 =0.80.25 =8.80.125 =1.50.125 =2.550.125=3.20.125 =100.125 =我发现：27 月 日 小数除法、乘法口算规律对比0.90.5 =0.90.5 =0.60.2 =0.60.2 =2.120.2=20.25 =20.25 =160.125 =160.125 =50.01 =50.2 =50.2 =3.50.1 =

13、3.50.1 =8.50.2 =我发现：28 月 日 小数除法混合口算1.84 =0.20.5 =0.240.12 =1.15 =1.2512.5 =2.60.42.5 =6.40.08 =0.660.2 =0.810.9 =30.4 =1.40.2 =3.90.2 = 3.20.2 =80.125 =5.10.3 =我发现：29 月 日 小数四则混合口算1000.01=0.360.121.50.01=60.5=43.70.25=3.6104.50.151.20.031.254=0.095=43.70.1258 =54.40.4= 3.53.51 0=0.810.9+1 =0.10.10.10

14、.1=我发现：30 月 日 小数四则混合口算1.84 =0.20.5 =3.140.2 =1.160 =1.2580.2 =2.642.5 =6.40.08 =(3.4+6.6)0.2 =1.8(0.9+0.9) =30.4 =4.10.2 =2.90.2 = 0.580.2 =15.880.125 =0.510.3 =我发现：31 月 日 小数四则混合口算3.60.1=0.130.4=30.6=7.50.3=480.12=0.180.3=30.6=4.50.3=3.71.23.7=0.24 + 40 =2.70.930.5=1.250. 8=1.50.30.484.8我发现：32 月 日 小

15、数四则混合口算7.070.740.5=0.31028.61000=0.420.6=2.80.07=3.61.2=7.79+9.5=34.9-32=14.99+14.9 =3+0.30.5=0.0425=2.80.07=8.51.70.150.5=我发现：33 月 日 小数四则混合口算0.32 0.4 = 3.21.6 =30.5 =7.2 0.08 =5.21.3 =04.8 = 2.17 =8.82.2 =02121036 =1.80.9 =4.2 0.6 =150.3 =24 =2.44 =我发现：34 月 日 小数四则混合口算1.53 =29.9 0.23=72.80.8 =21.36

16、0.8=81.2 =43.5304.38 0.73 0.840.6 19.621.27 =38191258=0842283=0729我发现：35 月 日 小数四则混合口算0.54 =2.1300.64=0.420.24.021000=3.25 =1.60.04 =0.240.3 = 0.5117 =1.65 =0960.103520 =03640622 =50.6 =我发现：36 月 日 小数四则混合口算4.20.1 =8.7 0.03 =10 0. 04 =70.14 =0.960.3 =125 + 5 =10122 =363 =819 =244 =4.10.9 =5.80.2 =2.40.

17、7 =3.10.5 =2.50.5 =我发现：37 月 日 小数四则混合口算0.51.3 =64.3216 =270.01 =0.462 40 =54 0.09 =12.8 0.16 =0.350.7 =7.52.5 =2124 =0153 =3.51 3 =4.4 50 =0.260.013 = 2.2515 =0844 =我发现：38 月 日 小数四则混合口算0.70.035 =0.150.5 =13.6513 =0.729 =2.130 =8.84 1.7 =6.21 0.03 =12.961.2 =8.51.7 =153 =5.04 6 =0.80.02 =7.22 =20.55 =0

18、.380.5 =我发现：39 月 日 字母表示数，省略乘号，简单7b =4n =0.5m =12a =3x =n7 =h5.6 =x0.6 =a4 =c1.8 =b1 =1m = 15a =y1 =x1 =我发现：40 月 日 字母表示数，省略乘号，稍复杂m7n =1.5ab = bh4 =m1.2n =y2.4x =m75 =1.5n6 = 0.157x =0.4b5 =h2.42 =7a3 =m0.25 =0.8x2.5=0.2a2.3 =h51.1 =我发现：41 月 日 字母表示数，省略乘号，平方数aa =mm =0.80.8 =0.22 =hh 0.30.3 =bb =O.90.9

19、=0.060.06 =1.22 =0.12 =xx = 55 =1.11.1 =0.052 =我发现：42 月 日 字母表示数1.5x0.2x =1.4ab3 =0.6n0.8n =0.13a6a =m1.20.2 =1.6a2 =4.6b2b =4t4t =0.6x0.4x =7n9.3n =0.2x8x =4.5b0.9b = 1.5m0.1 =4x0.4x=a1.42.6a =我发现：43 月 日 综合口算练习2.10.01 =2.48x1.2x =4.80.01 =7.20.8 =6.30.03 =3.480.8 =2.7n0.8n =0.050.6 =aa =1.2h4 =4.50.

20、5 =0.35 =00.9 =2.17a0.4a =0.40.5 =我发现：44 月 日 0.540.6 =3.4x2.91x =0.390.3 =5d0.2 =0.1250.8 =1.20.58 =0.240.2 =3.610 =4m2.1 =2.40.02 =3.20.01 =3.5x0.05x =1.250.8 =2.620.2 =h2 =我发现：45 月 日 nn =0.252.5 =0.250.4d =3.60.12 =0.1781.78 =3.1x2.4x =6.50.75 =0.720.8 =8.23.12 =12.5c0.08 =0.252.5 =0.250.4 =210.5

21、=1.20.7 =50.5 =我发现：46 月 日 0.50.8 =28.61.6 =5.40.06 =150.3 =2.40.08 =23.64 =9m4 =0.480.6 =7.52.05 =0.80.5 =h1 =5.40.5 =0.4712.50.8 =3.410.250.59 =3.14x2.9x =我发现：47 月 日 2.40.01 =4x1.2x =4.80.1 =7.20.08 =0.630.03 =1.480.8 =7n2n =0.040.6 =2a =5h4 =4.55 =0.36 =0.90.9 =3.6a0.4a =0.40.5 =我发现：48 月 日 0.540.9

22、 =3.4x2.8x =0.391.3 =5d2 =0.250.4 =1.20.5 =0.243 =3.610 =4m0.25 =1.20.02 =3.20.01 =2.4x0.04x =12.50.8 =2.620.6 =hh =我发现：49 月 日 2n =0.252.5 =0.250.4 =3.61.2 =01.78 =0.252.5 =752.5 =210.3 =1.20.7 =50.5 =0.30.8 =28.61.6 =0.540.6 =180.3 =2.40.08 =我发现：50 月 日 0.253.64 =2.1m4 =0.481.2 =7.52.05 =0.80.5 =b1

23、=5.40.2 =0.471.250.8 =3.412.70.41 =2.6x0.14x =5.40.1 =0.960.6 =2.80.01 =0.720.8 =0.60.03 =我发现：51 月 日 0.970.7 =575.7 =0.360.6 =480.6 =0.0120.003 =0.12 =0.210.7 =0.060.3 =6.30.07 =12.60.6 =0.24 =0.810.9 =3.60.04 =0.40.5 =0.540.9 =我发现：52 月 日 321.6 =0.390.3 =6.40.4 =22 =0a =2.5a+0.6a =2.50.01 =80.16 =9.69.6 =0.10.2 =0.32 =0.150.3 =3.610 =0.640.8 =1.20.0 =我发现：53 月 日 3.20.1 =2.70.07 =0.350.5 =1.29c-1.25c =0.180.6 =0.60.2=3.61.8=0.240.4=6.880.2=0.220.05 =4.50.05 =0.252.5 =3.60.04 =0