1、（除不尽保留 2 位小数）8.20.12 0.80.9 76.45.4 4.73 3242 14.362.7 8.336.2 1.70.03 用竖式计算85.4416 42.847 101.79 67.515 21.2436 0.73623 43.512 35.217 6.210.03 2101.4 51.30.27 91.23.8 0.660.3 11.971.5 69.62.9 38.40.8 1.3845.1 8.7883 2.661 0.0590.2 575.7 9.462.85 17.86.4 1.54.9 5.5555.2 2.223.33 7.65885 36.020.3 0.3
2、961.2= 0.7560.36= 15.613= 0.1815=0.02514= 3.0636= 0.040.12 3.842.6 16.90.13 1.553.9 2.50.7= （保留三位小数） 10.13.3= （商用循环节表示）10.7512.5= （用乘法验算） 3.259.04= （用除法验算） 能用简便方法的用简便方法计算4.87.8780.52 3.6102 4.84.80.5 (1.250.125)8 4.8100.1 56.59.95.65 7.0910.80.87.09 3201.258 18.769.91.876 3.522.50.4 1.252.532 3.6510
3、.1 3.63.60.8 15.20.254 4.2994.2 0.89100.1 17.8(1.784) (45.932.7)80.125 9.7999.7 4.3612.58 15.613.115.62.1 0.65101 27.53.77.53.7 8.542.50.4 解方程X+8.3=10.7 5x 30 x-5.6=9.4 x0.8=903x816 3x+9=27 5.3+7x=7.4 3x5=4.8X-0.8X=6 12x+8x=4.8 7(x-2)=49 48+2x=36(x-2)3=7 x5+9=21 (200-x)5=30 48-27+5x=319-x=3 91x 1.3 41-3x=17 813x=9
