五年级小数乘除法练习题70道.doc

5.62.9 3.771.8 0.0296 5.220.3 9.990.02 4.670.952.44 1.6666.1 9.4320.002 5.66.5 4.882.9 5.614.38.92.4 5.555 9.770.02 1.3845.1 8.7883 2.6610.0590.2 4.2681.7 575.7 9.462.85 17.86.4 1.54.92.50.8 5.5555.2 2.223.33 7.65885 36.020.3 56.788除法： 85.4416 42.847 101.79 67.515 230.46 21.24360.73623 43.512 35.217 39.624 6.210.03 2101.451.30.27 91.23.8 0.7560.18 0.660.3 11.971.5 69.62.938.40.8 150.06（循环小数的用简便方法，除不尽保留2位小数）：8.20.12 0.80.9 76.45.4 4.73 1.251.2 324214.362.7 8.336.2 1.70.03 2.410.7用竖式计算0.3961.2= 0.7560.36= 15.613= 0.1815= 0.02514= 3.0636=0.040.12 3.842.6 5.763 （保留一位小数） 7.1522 90.753.3 3.680.2516.90.13 1.553.9 3.70.016 13.760.8= 5.20.6 8.41.36.40.5 4.480.4 5.255 35.44.2 0.0420.54 0.760.320.250.046 2.523.4 1.0825 0.120.50.16 4.80.25 0.1251.4（保留两位小数）2.50.7= （保留三位小数） 10.13.3= （商用循环小数） 10.7512.5= （用乘法验算） 3.259.04= （用除法验算）3、脱式计算（能简算的要简算）2.57.14 16.129916.12 5.20.90.9 7.2899+7.28 4.3500.2 642.640.52615.715.724 (2.275 0.625)0.28 3.94+34.30.2 1.2(9.62.4)4.8 8.91.14.7 2.75.43.9 3.69.85-5.46 8.053.4+7.6 6.584.50.9 2.80.5+1.58 324.90.9 4.84.80.5 (1.250.125)8 4.8100.1 56.59956.5 7.0910.80.87.09 4.85 + 0.35 1.4 8.7 17.4 - 8.7 7.4 12.50.42.58 0.873.16+4.64 9.5101 0.68 （5.2 -3.5） 1.25 40.5 0.81 0.184.8 （15 2.4） 6.81+6.8199 0.2518540 4.40.83.40.8 (9.37+937+937+937) 25 2.376.3+2.373.7 2.51.250.32 3.810.1 2.5(3.80.04) 7.69101 3.810.10.2539+0.25 0.12572 460.33+540.33 (85.27) 1.25 6.81+6.8