小数乘除法计算题各20道题.doc

小数乘除法计算题各20道题、简便计算40道题、方程20道题小数乘除法计算题2010-02-07 09:24乘法：5.62.93.771.80.02965.220.39.990.024.670.952.441.6666.19.4320.0025.66.54.882.95.614.38.92.45.5559.770.021.3845.18.78832.6610.0590.24.2681.7575.79.462.8517.86.41.54.92.50.885.5555.22.223.337.6588536.020.356.788除法：85.441642.847101.7967.515230.4621.24360.7362343.51235.21739.6246.210.032101.451.30.2791.23.80.7560.180.660.311.971.569.62.938.40.8150.06（循环小数的用简便方法，除不尽保留2位小数）：8.20.120.80.976.45.44.731.251.2324214.362.78.336.21.70.032.410.7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 3.70.01613.760.8= 5.20.6 8.41.36.40.5 4.480.4 5.25535.44.2 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 5.20.90.97.2899+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)4.88.91.14.7 2.75.43.9 3.69.85-5.46 8.053.4+7.6 6.584.50.9 2.80.5+1.58324.90.9 4.84.80.5 (1.250.125)84.8100.1 56.59956.5 7.0910.80.87.094.85 + 0.35 1.4 8.7 17.4 - 8.7 7.412.50.42.58 0.873.16+4.64 9.5101 0.68 （5.2 -3.5） 1.25 40.5 0.81 0.18 4.8 （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 3.810.12.5(3.80.04) 7.69101 3.810.10.2539+0.25 0.12572 460.33+540.33(85.27) 1.25 6.81+6.8199 0.25185406.80.750.5 3.750.1252.75 1.53+23.47.29.599 13.50.98 12.58.8二、解方程：54-X=24 7X=49 126X=4213+A=28.5 2.4X=26.4 7.5x3x=1851.3-2x=5.5 24x+6x=63.6 5.6x+4.4x=5.2x3.86=5.4617.89x=12.8940.8x=57.3x3.25=162x0.828.230.5x77.8x2.680x41250.9x2.752x0.4x=4862x6x=1835x13x=9.60.5254x=0.60.7(x0.9)=421.3x2.43=12.43.5x = 1402x +5 = 4015x+6x = 1685x1.5 = 4.513.7x = 5.294.2 33x = 5.1 (写出检验过程)20.54x=8.13.6x1.2=9.75181.51.7x=13.418.5x9.9x=1.7219.2x+1.5x=32.17.258x=11.24x30.76.5(口算)0.61.2= 0.840.6= 4.50.1=150.4= 0.10.5= 2.87=1000.01= 1.43= 0.728=60.03= 0.50.6= 400.9=40.5= 72.1= 8.89+0.1=240.25= 0.10.01= 2.40.8=90.4= 100.01= 30.2-3.02=4.3-0.25= 1-0.82= 9.60.3=2.60.01= 025.4= 4.80.4=7.22.8=122.52.630.370.716160.2=0.960.31.54.5=2.50.41.42.5482.561.2=9.22.3=2445640.360.6440.25=1.85=30（2003）8.44.2=81.54.80.3=2.731.54计算下面各题(能简算的要简算)7.0523.7+7.0576.30.1253.22.512.81(1.5+7.81)8.72.6+6.48.7+8.7102511254.53.612.253.10.856.17（1.91.90.9）（3.82.8）2.651.71.351.7列竖式计算，得数保留一位小数。1.21.4 0.378.4 3.142.80.851.12 0.865.4 0.152.344014 26.3731 45.538156035 4.82.3 1.553.97.22.1 3.877 146.4135.636.1 2.840.03 0.380.1326.3731 3242 2.840.034.823 0.3820.13 4.24.5列竖式计算1.642.35= 8.656.31= 28.44814= 0.58250= 12.53.6= 10.8834= 107.64= 1.867= 13.886.29= 9260.15= 8500= 26.37.93= 237.06= 100.22.28= 449（精确到百分位） 三、计算（能简便的用简便方法计算）82512516 404250 4555（6821555） 329932 4.8396148 3452178712232556+4565 489101489 457+317+343+583 46564846464竖式计算：1824= 43.6826= 25.30.88=0.15753.15= 0.6121.8= 16.7870.28（保留一位小数）1、 算下面各题2.360.22 2.84.58 3.574.2 82