1、 - 1 - 小数简便运算练习小数简便运算练习(一一) 班级 姓名 得分 4.8+8.63+5.2+0.37 5.93+0.19+2.81 1.76+0.195+3.24 2.35+1.713+0.287+7.65 1.57+0.245+7.43 6.02+3.6+1.98 0.134+2.66+0.866 1.27+3.9+0.73+16.1 7.54.96.5 3.070.381.62 1.293.72.716.3 82.451.55 3.251.790.591.75 23.40.813.47.2 0.32403 3.20.364.81.64 1.233.40.236.6 0.2536 1
2、2.7（3.70.84） 36.541.764.54 0.250.734 7.60.80.27.6 0.85199 0.258.54 1.288.60.728.6 12.50.960.8 10.49.60.35 0.8（4.31.25） 3.123.1299 28.610128.6 - 2 - （4.236.17）0.8 0.8615.70.8614.7 2.4102 147.322.68 2.648.677.3611.33 2.311.20.5 （2.50.25）0.4 9.161.50.59.16 3.63.60.5 4.51.8 4.23.5 9300.65 63.42.50.4 4.9
3、1.4 3.9（1.35） （7.71.54）0.7 2.52.4 2.745 0.351.2520.8 32.40.90.132.4 150.25 7028 15（0.150.4） 4.252.59.90.17 小数简便运算练习小数简便运算练习(二二) 班级 姓名 得分 - 3 - 4.025.40.98 5.171.83.2 13.75(3.756.48) 3.687.562.68 7.852.340.854.66 35.61.815.67.2 3.822.90.189.1 9.64.83.6 7.140.532.47 5.272.860.661.63 13.354.682.65 47.8
4、7.45+8.8 0.398+0.36+3.64 15.75+3.590.59+14.25 42.5(6.071.13) 73.81.6413.85.36 66.868.661.34 0.2516.24 3.723.56.283.5 36.83.96.1 2 5.48(9.40.52) 4.87.8780.52 3.6102 6.40.253.64 324.90.9 4.84.80.5 (1.250.125)8 4.8100.1 56.59.956.5 7.0910.80.87.09 4.23.5 3201.258 18.769.918.76 3.522.50.4 4.780.23.44 3.
5、94.16.15.9 - 4 - 0.491.4 1.252.532 3.60.62 3.6510.1 3.63.60.8 15.20.254 5.63.5 9.60.80.4 4.2994.2 0.89100.1 146.5(2346.5) 17.8(1.784) 5.8324.27 (45.932.7)80.125 9.7999.7 4.3612.58 15.613.115.615.62.1 0.65101 27.53.77.53.7 8.542.50.4 3.834.563.835.44 小数乘法简便计算练习题小数乘法简便计算练习题 班级班级 姓名姓名 小数乘法的简便计算的方法： 1、乘
6、法交换律与结合律、分配率的运用。 （整数的运算定律在小数中同样适用） 2、表面上看来，左右两边没有相同的因数，不能使用乘法分配律。我们可以通过变一 变，分一分的方法找出相同因数再运用乘法分配律进行计算 - 5 - 0.258.54 12.50.960.8 0.250.734 4.3612.58 0.2516.24 1.252.532 3.20.2512.5 0.2536 (1.250.125)8 4.810.1 3.6102 0.39199 0.32403 3.6510.1 0.859.9 3.723.56.283.5 15.62.115.61.1 4.87.8780.52 56.59956.
7、5 7.0910.80.87.09 1.879.90.187 4.2994.2 3.84.563.835.44 9.7999.7 27.53.77.53.7 3.140.6831.40.032 7.20.22.41.4 5.45.411-5.4 7.74（2.81.3）1.52.26 3.92.73.97.3 12.79.91.27 2.316+2.323+2.3 3.654.7 36.50.37 1010.87-0.9187 46572386 10.716.1-15.110.7 7.60.80.27.6 1.288.60.728.6 10.60.359.60.35 8.91.01 0.651
8、01 48 80.560.5644440.48 0.48 0.279 93433430.6570.657279 0.264279 0.2645195192642640.4810.481 9.169.161.531.530.0530.05391.6 91.6 0.125 596 12.596 12.510.8 10.8 （20204 4）0.250.25 - 6 - 45 5212150502.1 2.1 45 51.581.585.55.51 15.8 255.8 257.37.30.40.4 小数乘法的简便运算小数乘法的简便运算 姓名 学号 成绩 一、一、 乘法交换律与结合律的运用。乘法交换
9、律与结合律的运用。 4.560.42.5 12.52.70.8 12.5320.25 2.532 12.556 250.36 二、二、 乘法分配律的运用。乘法分配律的运用。 0.2510.4 12.58.8 990.35 3.71.82.71.8 95.70.286.30.280.282 1.089 1.08 三、三、 比较乘法结合律与分配律在简便运算时的区别比较乘法结合律与分配律在简便运算时的区别（下面各题用不同的方法简算） 。 12.588 12.588 0.2548 0.2548 - 7 - 四、四、 变一变，能简算。变一变，能简算。 480.56440.48 0.2793430.657
10、279 0.2645192640.481 9.161.530.05391.6 3140.0433.147.231.40.15 五、五、 用自己喜欢的方法做一做。用自己喜欢的方法做一做。 5310.1 4.26.513.494.2 257.30.4 0.12596 12.510.8 （204）0.25 4521502.1 451.585.515.8 9.992.223.33 3.34 3.71.40.05 720.81+10.4 1.425+3.45 1.5102 1.250.70.8 2.73.7+0.3773 8.799 0.8（12.5 1.25） 1.250.480 2.5 51.030
11、.2 321.25 0.4599 表面上看来， 左右两边没有相同的因数， 不能使用乘法分配律。 - 8 - 甲有存款 4000 元，乙有存款 2400 元，乙从存款中取出一些后，甲的存款正好是乙 现在的 5 倍。乙取出多少元钱？ 有一堆煤，如果用甲种车一次运完，需要 36 辆; 如果用乙种车一次运完，需要 45 辆。已知甲种车比乙种车每辆多运 1.5 吨。问这批煤共有多少吨？ 小数乘法简便计算小数乘法简便计算 6.94.83.1 47.87.45+8.8 0.398+0.36+3.64 9.64.83.6 5.171.83.2 4.025.40.98 3.687.562.68 0.2516.2
12、4 5.272.860.661.63 73.81.6413.85.36 15.75+3.590.59+14.25 - 9 - 7.852.340.854.66 35.61.815.67.2 3.822.90.189.1 0.4566.223.78 15.89(6.755.89) 13.75(3.756.48) 3.6102 66.868.661.34 (1.250.125)8 13.354.682.65 7.140.532.47 10 3.723.56.283.5 36.83.96.1 4.87.8780.52 56.59.9 56.5 15.613.115.615.62.1 4.8100.1
13、 7.0910.80.87.09 32 4.90.9 25.48(9.40.52) 4.23.5 3201.258 18.769.9 18.76 3.522.50.4 3.9 4.1 6.1 5.9 5.63.5 9.60.80.4 4.299 4.2 17.8(1.784) 0.491.4 1.252.532 3.6510.1 15.20.254 0.89100.1 146.5(23 46.5) 11 3.834.56 3.835.44 4.3612.58 9.799 9.7 8.91.01 27.53.7 7.53.7 8.542.50.4 0.65101 3.20.2512.5 (45.
14、932.7)80.125 3.140.6831.40.032 5.61.250.82.50.4 7.20.22.41.4 7.74（2.81.3）1.52.26 3.92.7 3.97.3 181.80.1250.8 12.79.91.27 21（9.33.7）5.6 15.02-6.8-1.02 5.411-5.4 2.316+2.323+2.3 9.43-（6.28-1.57） 3.654.736.50.37 12 46572386 13.70.253.74 2.229.9+6.666.7 1010.87-0.9187 10.716.1-15.110.7 0.79199 4.8+8.63+
15、5.2+0.37 5.93+0.19+2.81 1.76+0.195+3.24 2.35+1.713+0.287+7.65 1.57+0.245+7.43 6.02+3.6+1.98 0.134+2.66+0.866 1.27+3.9+0.73+16.1 7.54.96.5 3.070.381.62 1.293.72.716.3 82.451.55 3.251.790.591.75 23.40.813.47.2 0.32403 13 3.20.364.81.64 1.233.40.236.6 0.2536 12.7（3.70.84） 36.541.764.54 0.250.734 7.60.8
16、0.27.6 0.85199 0.258.54 1.288.60.728.6 12.50.960.8 10.49.60.35 0.8（4.31.25） 3.123.1299 28.610128.6 0.8615.70.8614.7 2.4102 2.311.20.5 147.322.68 2.648.677.3611.33 7028 （2.50.25）0.4 9.161.50.59.16 3.63.60.5 14 63.42.50.4 4.91.4 3.9（1.35） （7.71.54）0.7 2.52.4 2.745 15（0.150.4） 0.351.2520.8 32.40.90.132
17、.4 150.25 4.51.8 4.23.5 9300.65 小数乘除法简便计算小数乘除法简便计算专项练习专项练习 班级：班级： 姓名：姓名： 一、计算一、计算 1.251.253 3. .2 20.250.25 4.74.71.251.251.61.6 1.251.258888 1.251.256 6. .4 40.25 0.25 4.64.60.35+4.60.35+4.60.650.65 15 2.552.551.5+1.5+6.451.5+1.5+6.451.51.5 2.952.95101101- -2.952.95 1 12.2.5 55 50.160.16 3.23.210.1
18、10.1 0.520.52105 105 10.0110.014.54.5 5 59 90.250.25 1.81.80.9+0.180.9+0.18 5.45.40.68+3.40.68+3.42 20.460.46 8.98.9 9.9+119.9+110 0.99.99 （1.25+0.251.25+0.25）1616 23.923.9- -0.60.60.60.6- -0.64 0.64 3.73.70.440.442.52.5 9.739.7312.512.50.80.8 7.87.84.864.863.93.9 1 1.9.98.88.8 0.880.88 28.928.94 42
19、89 289 0.77770.77770.7+0.11110.7+0.11112.12.1 8888881 1. .6+2226+2223 3. .6 6 920.9+7.2 4.84.87.87.878780.52 1.870.52 1.87 9.99.90.187 0.187 3.143.140.680.6831.431.40.032 7.20.032 7.20.20.22.42.41.4 1.4 4.24.2 16 98988.4 8.4 7.747.74（2.82.81.31.3）1.51.52.26 12.72.26 12.79.99.9 1.27 1.27 2.32.316+2.3
20、16+2.323+2.3 23+2.3 3.653.654.74.736.536.50.370.37 4.64.657572.32.386 2.2286 2.229.9+6.669.9+6.666.7 1016.7 1010.870.87- -0.910.91 87 87 二、填空二、填空 1 1、已知、已知 25.1625.160.37=68，直接写出下列各式的得数。，直接写出下列各式的得数。 251.63.7= 0.25150.37= 2.51637= 25.160.037= 2.5160.037= 25.16（ ）=6.8 2 2、1 1 吨吨 3636 千克千克= =（ ）吨）吨 84
21、84 分分= =（ ）小时）小时 1515 千克千克 1515 克克= =（ ）千克）千克 3636 小时小时= =（ ）天）天 3 3、将、将 3.183.181.8、3.180.8、3.181.2、3.181、3.180.99 从小到大的顺序排列从小到大的顺序排列 （ ） 4 4、7.077.070.3 商是商是 23.5，余数是（，余数是（ ） 5 5、根据、根据 21221234=720834=7208，在（在（ ）里填上合适的数。）里填上合适的数。 2.122.1234=34=（ ） （ ）34=0.720834=0.7208 2.122.12（ ）=7.208 21.2=7.208
22、 21.20.34=0.34=（ ） 0.02120.0212340=340=（ ） 0.2120.212（ ）=72.08=72.08 17 6 6、两个数相乘，小马虎把第一因数两个数相乘，小马虎把第一因数 30.9530.95 中的中的 9 9 写成了写成了 6 6，结果积比正确答案，结果积比正确答案 少少 0.810.81，那么另一个因数是多少？，那么另一个因数是多少？ 五年级数学简便计算练习卷五年级数学简便计算练习卷 下面各题怎样算简便就怎样算。 （1 1）小数加减法计算）小数加减法计算 6.94.83.1 0.4566.223.78 15.89(6.755.89) 4.025.40.
23、98 5.171.83.2 13.75(3.756.48) 3.687.562.68 7.852.340.854.66 35.61.815.67.2 3.822.90.189.1 9.64.83.6 7.140.532.47 5.272.860.661.63 13.354.682.65 73.81.6413.85.36 47.87.45+8.8 0.398+0.36+3.64 15.75+3.59 0.59+14.25 66.868.661.34 36.83.96.1 324.90.9 25.48(9.40.52) 3.94.16.15.9 15.02-6.8-1.02 324.90.9 14
24、6.5(2346.5) 9.43-（6.28-1.57） 4.8+8.63+5.2+0.37 5.93+0.19+2.81 1.76+0.195+3.24 2.35+1.713+0.287+7.65 1.57+0.245+7.43 6.02+3.6+1.98 0.134+2.66+0.866 1.27+3.9+0.73+16.1 7.54.96.5 3.070.381.62 1.293.72.716.3 82.451.55 18 3.251.790.591.75 23.40.813.47.2 3.20.364.81.64 1.233.40.236.6 12.7（3.70.84） 36.541.
25、764.54 147.322.68 2.648.677.3611.33 （2 2）小数乘法计算）小数乘法计算 0.2516.24 (1.250.125)8 3.6102 3201.258 3.723.56.283.5 1 4.87.8780.52 0.8100.1 5.613.115.615.62.1 4.23.5 7.0910.80.87.09 18.769.918.76 3.522.50.4 56.59.956.5 515.613.115.615.62.1 4.87.8780.52 4.23.5 4.8100.1 56.59.956.5 7.0910.80.87.09 18.769.918
26、.76 3.522.50.4 3201.258 9.60.80.4 4.2994.2 15.20.254 0.89100.1 17.8(1.784) 0.491.4 1.252.532 3.6510.1 3.834.563.835.44 9.7999.7 3.140.6831.40.032 27.53.77.53.7 8.542.50.4 0.65101 3.20.2512.5 (45.932.7)80.125 5.61.250.82.50.4 4.3612.58 7.20.22.41.4 8.91.01 7.74（2.81.3）1.52.26 3.92.73.97.3 181.80.1250
27、.8 12.79.91.27 21（9.33.7）5.6 5.411-5.4 4.51.8 4.23.5 19 63.42.50.4 4.91.4 3.9（1.35） 9300.65 7.71.54）0.7 2.52.4 2.745 15（0.150.4） 0.351.2520.8 32.40.90.132.4 150.25 （2.50.25）0.4 9.161.50.59.16 3.63.60.5 7028 0.8（4.31.25） 3.123.1299 28.610128.6 0.8615.70.8614.7 2.4102 2.311.20.5 7.60.80.27.6 0.85199 0
28、.258.54 4.63.5 1.288.60.728.6 12.50.960.8 10.49.60.35 0.2536 0.250.734 0.32403 46572386 0.79199 13.70.253.74 2.229.9+6.666.7 2.316+2.323+2.3 1010.87-0.9187 10.716.1-15.110.7 3.654.736.50.37 4.8+8.63+5.2+0.37 4.8+8.63+5.2+0.37 5.93+0.19+2.81 5.93+0.19+2.81 1.76+0.195+3.24 1.76+0.195+3.24 2.35+1.713+0
29、.287+7.65 2.35+1.713+0.287+7.65 1.57+0.21.57+0.245+7.43 45+7.43 6.02+3.6+1.986.02+3.6+1.98 20 0.134+2.66+0.8660.134+2.66+0.866 1.27+3.9+0.73+16.11.27+3.9+0.73+16.1 7.57.54.94.96.5 6.5 3.073.070.380.381.62 1.62 1.291.293.73.72.712.716.3 6.3 8 82.452.451.551.55 3.253.251.791.790.590.591.751.75 23.423.
30、40.80.813.413.47.2 7.2 12.712.7（3.73.70.840.84） 3.23.20.360.364.84.81.64 1.64 1.231.233.43.40.230.236.6.6 6 36.5436.541.761.764.544.54 0.250.250.730.734 4 0.250.253636 0.320.32403403 7.67.60.80.80.20.27.67.6 0.850.85199199 0.250.258.58.54 4 1.281.288.68.60.720.728.6 8.6 12.512.50.960.960.8 0.8 10.41
31、0.49.69.60.350.35 21 0.80.8（4.34.31.251.25） 3.123.123.123.1299 99 28.28.6 610110128.628.6 （4.234.236.176.17）0.80.8 0.860.8615.715.70.860.8614.7 14.7 2.42.4102102 14147.327.322.68 2.68 2.642.648.678.677.367.3611.3311.33 2.312.311.21.20.50.5 （2.52.50.250.25）0.4 0.4 9.169.161.51.50.50.59.16 9.16 3.63.6
32、3.63.60.50.5 （8+0.88+0.8）1.25 0.251.25 0.254.44.4- -0.250.250.4 2.360.4 2.36101101 4.54.51.8 1.8 4.24.23.5 3.5 9309300.60.65 5 63.463.42.52.50.4 0.4 4.94.91.4 1.4 3.93.9（1.31.35 5） （7.77.71.541.54）0.7 0.7 2.52.52.4 2.4 2.72.745 45 22 0.350.351.251.252 20.8 0.8 32.432.40.90.90.10.132.4 32.4 15150.25
33、0.25 70702828 1515（0.150.150.40.4） 4.254.252.52.59.99.90.170.17 6.3+4.82+3.76.3+4.82+3.70.82 0.82 30730710.1 10.1 0.450.4518 18 13213243.743.756.356.3 0. 320. 3212.512.52.5 2.5 5.65.61.25 1.25 7.67.627277.67.61741747.6 7.6 7272 1.251.25 8 8 270270 4.5 4.5 （7.77.715.415.4） 7 7 9.99.934 34 1.51.51.21.
34、28.88.81.5 1.5 4.74.78.38.35.25.28.38.30.83 0.83 7.127.124 41.121.124 4 450450 2.52.5 2 2 23 12.512.58.8 8.8 （1251251.251.25）0.8 0.8 3.53.50.40.43.53.50.6 0.6 3939 （1.31.35 5） 2.22.2 4 40.60.64 4 4.834.83 5 52.172.17 5 5 4242 3.5 3.5 26.726.70.50.55 57.57.5 48.448.42.782.7851.651.60.480.48 7.37.32.72.77.37.32.7 2.7
