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1、4.8备练习0.96弋.03二2.4弋.2二25.8 弋.6二弋.3二书二22.8弋二5.98弋.23二19.76帖.2二3.81叼二246.4勻3二2.17弋.7二0.4弋.0仁5.3+6.7=5.4-3.6-1.4=300.01=15T5二2.8 12.9-8.5=7.20.4=X1.4=8+2-8+2=286+198=314-202=526+301=223-99=0.45X2.5=0.3X3.6=0.3X0.3=100.07=0.3X.4=0.05X=2.140.9=练习0.5+7.6=240詔8二420000=0.750.38=396+99=90X30=20X35=10.2=32.25
2、=1.57+3.43=286+199=18.549.9=36X99=2.4吃二48P.6二0.24弋.2二4.8备0.96弋.03二2.4弋.2二4.8弋.6二9.6弋.3二3.24吃4二3.24弋.24二3.24迄4二2.4吃二48P.6二0.24弋.2二3.215X100二1.10.2=2.50.4二500.04=0.165=1.20.5=123.9=4.2.5=2745673=0.9弋.01=13-4=练习（三）0.810=0.60.8=3.60.4=800.3=1.782.2=0.7弋.0仁二1.6+2.40.3=0.30.3=12P.3二=4.08100=30.9=12.58=1.1
3、9=9.6弋.6=2.50.4=3.92.03=2.140.9=7.22.8=2.87弋.7=1.50.4=0.920.4=0.020.1=8.2+1.8=2.50.4=3.250.5=0X3.52=10-1.8-7.2=0.90.8=1.05100=1.47弋.7二0.56100=练习（四）0.2X0.26=0.14X4=1.20.3=0.2X0.4=10035.22=2.4X5=0.90.52=12.5X3=0.43+3.57=7.5x-3x=5.4备3.78X100=2.3X4=0.22X4=3.99X=8斗10=2.5X4X12=a+3a+7a=0.96七二X10=4P.8二练习（五）
4、2.5弋.7二10.1.3二10.75-12.5=二12.58.8=0.430.28=8.9 6.450.73=0.6=0.05=3.080.43二1.526.7=5.22吃9二18.72.6二13.95弋.仁8斗10=10-1.8-7.2=0.43+3.57=2.5412=0.90.8=7.5x-3x=a+3a+7a=0.96七二1.05100=1.47弋.7二5.4咻128弋.4二78P.6二七.2二65弋.05二54-0.12=32弋.4二36弋.18二练习（六）0.350.3二1.45=2.8X4=19.6詔二22.54=0.396T2二0.756弋.36二15.613=0.18X15
5、=0.02514=3.0636=0.04X0.12=3.842.6=5.76X3=7.15X22=16.9 90.75.3二3.680.2=乂.13二1.55.9二3.7X0.016=13.76X0.8=5.20.6=8.4X1.3=6.4X0.5=4.480.4=5.25X5=35.4X4.2=0.0420.54=0.76X0.32=0.25X0.046=练习（七）7弋.25=2.5X0.7X0.8=82.5=16T6=5.6X1.01=0.36+0.64=64.32勻6=72.8乂.8=8.4詔.2=13.8+9.9=2.4X2.5=0.050.8=2.560.37=12X2.5=1.23
6、X3=3.2T6=3.5+3.5X3=19.6吃二8.8迄2二0.75X4=0.5X0.8=8.4X0.2=1.6X0.2=7.2X0.3=2.8X0.3=0.9-0.15=1.8X0.4=5.5弋.55二0.08X100=42P.003二81P.03二10吃.5二8.6弋.002二2.5弋.005二6.3吃仁8.4弋.0084二4.6弋.023二133乞0007二0.00125帖0二练习（八）78P.06二7.2-0.002=120-0.024=0.0036七.6二0.36弋.0006二8.6弋.0043二1.28.2二0.009弋.005二5.05弋.5二5.6叼00二45弋.005二10
7、00-1.25=7.5-5=8.6-2=7.5-2=46-0.0023=9.8-0.7=39-0.0003=123000-1.23=760-0.008=9.599=0.29迄9二63+124+76=9.5101=3.810.1=22.8弋二3.81叼二2.17弋.7二5.4-3.6-1.4=12.9-8.5=8+2-8+2=练习（九）13.50.98=3.40.2=7.0910.8=3.810.1=0.12572=5.98-0.23=仁300.01=7.20.4=286+198=0.1-0.047=0.57T9二0.87.09=7.69101=719+7=19.76T5.2=246.4T13=
8、5.3+6.7=15T1.5=2.81.4=314-202=练习（十）10257682二645-45X12二10-2.87-7.13=0.96+9.69.9=401X19+284二640+12845=1.25X8-1.25=5.370+4.63=2.57.14=16.12990.9=7.2899+7.28=4.3500.2=642.640.5=8.9 3.94+34.30.2=1.14.7=2.75.43.9=3.69.85-5.46=8.053.4+7.6=6.584.50.9=70+50为0+70二练习(十一)13.7+0.98+0.02+4.3=18.63.470.53=7210172=
9、235X283528=2.678+787.4=7.26-(5.26-1.5)=82.5+0.25)=1.250.80.5=(1.5+0.25)4=0.120.50.16=7.2899+7.28=4.3500.2=5436-18=10245-328=10019036-18=3.85.25+14.5=300-4263-21=0.81弋.25+5.96二403-1327=(25+4)4=(1.2+1.8)4.5=练习（十二）526+301=223-99=0.45X2.5=0.3X3.6=0.3X0.3=10XQ.07=0.3X1.4=0.05X7=0.920.4=0.2X0.26=0.14X4=0.
10、020.1=1.2X0.3=0.2X0.4=8.2+1.8=10035.22=2.3X4=2.50.5=0.90.52=3.99X=0X3.52=12.5X3=5.42.51.4=2.51.250.32=126.23.8=(180+20)弋二4.84.8X0.5=4.8X00.1二4.85+0.35-1.4=40.5弋.81X).18=2.13X0X8257=0.25X185X40=0.25X39+0.25=6.81+6.81X99=6.8X).75弋.5二1.53+23.4叼.2二练习(十三)(1.250.125)X8=56.5X9956.5=0.87X3.16+4.64=4.8X15+2.
11、4)=6.81+6.81X99=2.5X(3.8X0.04)=(8X5.27)X1.25=0.25X185X40=3.75+0.125-2.75=1.2+3.2+0.8=练习（十四）199+0.78=5.47.26书.05)=8.77.4=12.50.42.58=0.68+(5.2-3.5).25=(0.25+2.5+25)0.4=5-0.9X0.2+1.8弋.5二6.43.28+4.63.28-3.28=12.27+21讯7.36.6)X2.4二4.40.83.40.8=(9.37+9.37+9.37+9.37)2.5=2.376.3+2.373.7=460.33+540.33=1.93+2
12、.7+2.07+7.3=2615.7+15.724=(2.2750.625)0.28=85.07(15.34.8)+5.369=40(3.52.75+0.86)=3725+268为7二(32+360詔5)X72二412-60736X14)(13.88.7)0.034=3.375+5.75+2.25+6.625=3.375X0.97+0.97X6.625=95.6X1.8+95.6X8.2=3.27X4+3.27X5.7=练习(十五)(7590314)54=10.5珂5.2-3.5)=6.25+3.85-2.125+3.875=2.1X4.3+5.7X2.1=6.54+2.4+3.46+0.6=1.5X4.20.75旳25二0.25X800.45弋.9二X七二练习(十六)(8L寸co)X(6908900)hoooo+09ox00寸elb+eN)+9臭卜丈寸oH9L+9LX0N+O99L(寸.眾9.6X0L9卜8|90二0.6心*99.9Llod9H9、9US0CO卜eNL*羅毘龔-(90.0X寸寸L)+9e.0LOLH6.0xQo8寸co(十)W燻H9印(99+6.00.9)P.25二)-1.7=1.521.655.7=3.27(-0.
