1、练习（一）4.86= 0.960.03= 2.40.2= 4.80.6= 9.60.3= 25.86= 22.83= 5.980.23= 19.765.2= 3.817= 3242= 246.413= 2.170.7= 0.40.01= 5.3+6.7= 5.4-3.6-1.4= 300.01= 151.5=12.9-8.5= 7.20.4= 2.81.4= 8+2-8+2= 286+198= 314-202= 526+301= 223-99= 0.452.5 0.81.25 0.33.6 0.30.3100.07 0.31.4 0.057 练习（二）2.140.9= 0.5+7.6= 240
2、48= 4200300= 0.750.38= 396+99= 9030= 2035= 10.2= 32.25= 1.57+3.43= 286+199=18.549.9= 3699= 2.42= 480.6= 963= 0.240.2= 4.86= 0.960.03= 2.40.2= 4.80.6= 9.60.3= 3.2424=3.240.24= 3.242.4= 2.42= 480.6= 963= 0.240.2= 练习（三）3.215100= 0.810= 4.08100= 1.10.2 = 0.60.8 = 30.9= 2.50.4= 3.60.4= 12.58= 500.04= 800
3、.3 = 1.19=0.165= 1.782.2 = 9.60.6 = 1.20.5= 0.70.01= 2.50.4= 123.9= 6.60.66= 3.92.03 4.23.5 1.6+2.40.3= 2.140.92745673= 0.30.3= 7.22.8 0.90.01 120.3= 2.870.7 134 0.960.3 1.50.4 练习（四）0.920.4 0.20.26 0.144 0.020.1 1.20.3= 0.20.4 8.21.8 10035.22 2.342.50.4 2.45 0.224 3.250.5= 0.90.52 3.991 03.52 12.58
4、810 = 10-1.8-7.2= 0.43+3.57= 2.5412=0.90.8= 7.5x-3x= a+3a+7a= 1.05100= 10.5= 0.963= 1.470.7= 5.46= 0.16.510= 0.56100= 3.78100= 40.8=练习（五）2.50.7= 10.13.3= 10.7512.5= 3.259.04= 12.58.8= 0.430.28= 6.450.73= 4.60.6= 8.90.05=3.080.43= 1.526.7= 5.2229= 18.723.6= 13.953.1= 810= 10-1.8-7.2= 0.43+3.57= 2.541
5、2= 0.90.8= 7.5x-3x= a+3a+7a=1.05100= 10.5= 0.963= 1.470.7= 5.46= 1280.4= 780.6= 9.63.2= 650.05= 540.12= 320.4= 360.18=练习（六）0.350.3= 1.45= 2.84= 、19.64= 22.54= 0.3961.2=0.7560.36= 15.613= 0.1815= 0.02514= 3.0636= 0.040.12 3.842.6= 5.763 7.1522= 90.753.3= 3.680.2= 16.90.13=1.553.9= 3.70.016= 13.760.8=
6、 5.20.6= 8.41.3= 6.40.5= 4.480.4= 5.255= 35.44.2= 0.0420.54= 0.760.32= 0.250.046=2.523.4= 1.0825= 4.80.25 练习（七）70.25 2.50.70.8= 82.5161.6 5.61.01= 0.360.64= 64.3216 4.20.1 72.80.8 8.44.2 13.89.9 2.42.5 0.050.8 2.560.37 122.5 1.233 3.21.6 3.53.53 19.62= 8.82.2= 0.754 0.50.8= 8.40.2= 1.60.2 7.20.3= 2.
7、80.3 0.90.15=1.80.4= 5.50.55= 0.08100= 2.20.11= 5.464.54= 12.50.8= 练习（八）420.003= 780.06= 450.005= 810.03= 7.20.002= 10001.25= 102.5= 1200.024= 7.55= 8.60.002= 0.00363.6= 8.62=2.50.005= 0.360.0006= 7.52= 6.321= 8.60.0043= 460.0023= 8.40.0084= 1.283.2= 9.80.7= 4.60.023= 0.0090.005= 390.0003=133.0007=
8、5.050.5= 1230001.23= 0.0012550= 5.6700= 7600.008= 4.3296= 4920.004= 18.630.03= 练习（九）9.599= 13.50.98= 0.1-0.047=0.292.9= 3.40.2= 0.5719= 63+124+76= 7.0910.8= 0.87.09= 9.5101= 3.810.1= 7.69101= 3.810.1= 0.12572= 719+7=22.83= 5.980.23= 19.765.2= 3.817= 3242= 246.413= 2.170.7= 0.40.01= 5.3+6.7= 5.4-3.6-
9、1.4= 300.01= 151.5=12.9-8.5= 7.20.4= 2.81.4= 8+2-8+2= 286+198= 314-202= 练习（十）102576832= 645-4512= 10-2.87-7.13= 0.96+9.69.9= 40119+284= 640+12845= 1.2581.25= 5.370+4.63= 2.57.14= 16.129916.12=5.0-0.90.9= 7.2899+7.28= 4.3500.2= 642.640.5= 3.94+34.30.2= 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=
