小数乘除法简便练习题

精品文档 小数乘除法简便练习题小数乘除法简便练习题 班级___________姓名______________ 2.57.116.1299 ＋ 16.125.20.9 ＋ 0.9.3500.2 0.751990.8615.7－0.8614.0.253.23.5 7.28997.22615.7＋15.724 8.053.47.3.3225 4.8100.1 .0910.8－0.87.09 0.9 1.9.599.8 1.24.832＋4.9－0.12.50.42.584. 1 .8－4.80.50.279343＋0.65727. 17.-..4 五上小数乘除法简便运算专项练习题 班级___________姓名______________ 2.5 .829951.250.320.12572 0.25390.256.80.750.280.56 ＋ 440.412.556 13.50.12.58.5.70.28＋6.30.28－0.282 9.59.161.53－0.0539194.23.5 153.42.506－3.60.7 0.8 40. 0.81 0.184.40.8－3.40. ．5 2 小数乘法简便计算练习题 2016 1 1 / 6 6 精品文档 班级姓名 小数乘法的简便计算的方法 1、乘法交换律与结合律、分配率的运用。 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 0.258.5412.50.960. 0.250.734.3612.58 0.2516.241.252.5323.20.2512.0.2536 8.810.1.610 0.39199 0.324033.6510.10.859.93.723.5 ＋ 6.283.5 15.62.1－15.61.1.87.8＋780.56.599＋ 56.5 7.0910.8－0.87.091.879.9＋0.184.299＋ 4.2 3.84.56＋3.835.449.799＋9.7.53.7－ 7.53.7 3.140.68＋31.40.0327.20.2＋ 2.41.45.411-5.4 7.74＋1.52.2.92.7＋3.97. 12.79.9＋ 2016 2 2 / 6 6 精品文档 1.27 2.3162.3232.33.654.－ 36.50.371010.87-0.9187 4657 ＋238 10.716.1-15.11060.8＋ 0.27.6 1.288.6 ＋ 0.728.10.60.35 － 9.60.38.91.010.65101 480.56＋440.40.279343＋ 0.6572790.264519＋2640.481 9.161.53－ 0.05391.0.125912.510.80.25 4521－502.1451.58＋ 5.515.8257.30.4 一、计算题 1、直接写出得数。 0.452.5＝ 0.81.25 ＝0.33.6 ＝0.30.3 ＝100.07 ＝ 0.31.4＝0.057＝0.920.4＝0.20.26＝ 0.144 ＝ 0.020.1＝1.20.3＝0.20.4＝ .2＋1.＝ 100－ 35.22＝.34 ＝.50.4 ＝.45＝0.224＝.250 ＝ 0.9－0.52＝.991＝03.5212.5410 10-1.8-7.2 0.433.57.54120.90.8 1.0510010.5 0.9631.470.75.460.16.510 0.60.8 2016 3 3 / 6 6 精品文档 0.5610030.9 3.781002.50.4 40.83.60.4 3.2151000.810.081001.10. 12.5800.0400. 1.19 0.16 ﹦1.78 ＋ 2..60.1.20.5-0. 0.70.012.50.12 ＋ － 2.033.91.2581.26.60.6.3704.6.9 ＝ .23.5 ＝ 1.62.40..14 － 0.9 ＝ 27 ＋ 456 ＋ 73 0.30.37.2＋ 2.8＝0.90.01＝120.3.870.7 ＝ 134 ＝ 0.960.3 ＝ 1.50.4 ＝ 0.25 ＝.50.70.88－2.5＝161.6＝5.61.01 8＝0.36＋0.64＝64.3216＝.20.1＝72.80.8 ＝ .44.2＝ 13.8 ＋9.9＝ .42.5＝0.050.8＝ 2.56 － 0.37 ＝1.250.80.5 ＝122.5 ＝1.233 ＝ 3.21.6＝3.5＋3.53＝19.62＝.82.2 0.754 ＝4＝0.50.88.40.21.60.2 ＝ .20.32.80.3 ＝ 0.90.151.80.4.50.55 0.081002.20.11 .46＋4.54 12.50.80.350.31.45.84 2016 4 4 / 6 6 精品文档 19.6422.54 2、用竖式计算 0.3961.2 0.7560.36 15.613 0.1815 0.02514 .0636 0.040.12＝.1522 16.90.13 13.760.8 6.40.5 3.842.6≈ .1.553.95.20.64.480763＝ 0.20.0168.41.5.255 90.753.683.7 35.44.0.0420.540.760.32 0.250.0462.523.1.0825 0.120.50.16＝.80.25＝ 2.50.7 10.7512.5 0.1251.4≈ 10.13.39.043.25 3、脱式计算 2.57.116.1299＋16.125.20.9＋0.9 7.28997.28 2615.7＋15.724 3.9434.30.2 2016 5 5 / 6 6 精品文档 8.91.14.7 8.053.47.6 4.3500.64 － 2.640.0.2.75.43. 1.24.8 6.584.50.93.69.85-5.4.80.51.584.8 － 4.80.5 32＋4.9－0. 86.599＋56.5 4.8100.17.0910