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1、一、直接写出得数0.58=3.60.4=39.680=47.61=40.5=120.06=121.2=330=0.157=3.26+3.24=2.540.36=0.2+0.80.5=6.031000=100.6=6.450.01=0.10.1=0.240.5=5.4+3.6=1.25-0.25=10.24.5=2.5x6=90.25=0.1254=1.2580.5=160.01=1.780.3=0.270.003=0.010.1=1.820=-0.4x=5d-2d=3.60.4=0.6x0.8=2.4x3=0.120.7=45=1.60.5=0.20.05=2.52.34=1.51.5+1.5
2、=3.6-1.22.4=4.76+44.7=0.540.54=38.500.38=0.60.8=30.9=2.50.4=3.60.4=12.58=500.04=800.3=1.19=二、用竖式计算8.08-2.68=5.546+29.38=三、竖式计算(得数保留一位小数)0.430.2952.60.234.580.37四、竖式计算(得数保留两位小数)27.60.4520122.91.85.080.25五、竖式计算(得数保留三位小数)2.50.7=2.50.7=3.259.04=六、竖式计算(用循环小数表示商)36.81610.13.315.3110.781七、脱式计算(2.65+2.77)(1
3、.98-0.98)3.791.6+6.391.60.45120.26.22.1-2.12.8-2.80.1560.251.81443.627.20.873.16+4.646.80.750.513.750.125-2.7553+23.47.228-(3.4+1.252.4)(31.8+3.24)531.54(6+3)0.64257.8+2.222.5+2.52194-64.81.80.936.724.259.95180-7056242.4-2.50.83.416(0.01635)八、用简便方法计算下面各题5.122.544.8812.517.80.89.92.59.45.8+10.65.80.1250.320.259.6+9.6992.87.6+1.42.8+2.86.310.10.253.212.512.59.7712.58.73.791.6+6.391.616.84400.2512.50.42.589.51014.27.8+2.24.22.557.1+2.457.1九、解方程4(x+0.3)=4.81.2x-0.8x=9.6X1.8=0.9720.06X=1.02X0.13=0.712.4X=31