1、1185.4416 41.847 21.79 67.5105 230.40.6 121.2436 0.73623 43.512 35.217 39.6246.210.03 2101.4 51.30.27 91.23.8 0.7560.180.660.3 11.971.5 69.62.9 38.40.8 150.0615.62.9 3.771.8 0.0296 5.220.3 9.990.0224.670.9 52.44 1.6666.1 9.4320.002 5.66.54.882.9 0.614.3 8.92.4 5.555 9.770.021.3845.1 8.7883 12.661 0.
2、0590.2 4.2681.75.75.7 9.462.85 17.86.4 1.54.9 12.50.885.5555.2 2.223.33 7.65885 36.020.3 56.7883（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 1.251.23242 14.362.7 8.336.2 1.70.03 2.410.7用竖式计算0.3961.2= 0.7560.36= 15.61.3= 0.181.5= 0.0251.4= 13.0636= 0.040.12 3.842.6 5.763 17.1522 90.753.3 3.68
3、0.25416.90.13 1.553.9 3.70.016 13.760.8= 5.20.6 18.41.3 6.40.5 4.480.4 15.255 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）52.50.7= （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.
4、2 642.640.52615.715.724 (2.275 0.625)0.28 3.94+34.30.2 61.2(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+1.58324.90.9 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 7.4 12.50.42.58 70.873.16+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+9 37) 25 2.376.3+2.373.7 2.51.250.32 3.810.1 2.5(3.80.04) 7.69101 83.810.1 0.2539+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
