小数方程计算专项练习题11.pdf

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1、-.小数方程专项练习有答案1 x+0.554=3.686x8.54=2022x8=0.8936x=0.431.52+2x=544.7x=1.9x+7512.6x+4.82=63612.5+4x=21.7713.5x8.5x=20-109.6xx=43113x40.9=46.2123.5x47=4213x0.9x=81.9143.8+5x=12.3优选-.1540.3+x=6.8232.5x20=16168x1.6x=19.2246.2xx=41.617x1.8=1.621822.52+5x=135，191.4x+9.8=22.4，202x3=11.6，21684.4x=24，221.685x=

2、2.3-25x0.5=48.62265X7.8=20.2，272.5XX=1.8，28 4.5+X2=13，297x29=80，3013x7.5x=18.7，优选-.31 x+126=108，392x2.510=15324x+30.7=6.5403.85+1.5x=6.1332x0.5=1.6343x2.34=4.914351.44x=0.4362x+6=12.5372.5xx=1.238 4.5+x2=63-4113x+2.5=169422x2+1.8=3.6437x1.2=3.57442+1.82x=3.6457x0.3=4.2466x+4x11=32.9优选-.477x1.2=2.875

3、53x+7=29.5482.4+3.4x=5.8565x2.81.2=1.04495x1.2=35502.5x+51=178512.4x+1.6x=2.2528x6.2=41.6530.5x0.5=7.554 9x+1.5+7x5=5.1-574x+6x=28.5582.38x+9.8=33.6592x3=10.66013xx=14.461681.1x=24623x+3.5=21.6优选-.633x54=136.5717x0.7=1.3，64x0.36x=3.272 5.9+x3+16=30，654x+2.84=19.32664x5.2=5.2674.8x+2.6x=3.7683x+6.42=

4、50.3692.7x1.8=1.2x+2.7，70856x+0.7=10 x+0.5，-730.5654x=0.4，744x0.5=9.6，752x+1.7=9.2768x4x=0.64772x0.24=0.1278）3.82x=14.4优选（-.796416X=56.88535.4+X6=7.2，808.6X2.6X=36.6865.9X+7=8.7X，82640.6X=6.36830.031505x=3.28445.34X=35.7，-873+0.6x=4.32880.6y0.4=6，优选-.小数方程小数方程 8888 题参考答案：题参考答案：1 x+0.554=3.6x+0.544=3.

5、64x+0.5=0.9x+0.50.5=0.90.5x=0.422x8=0.82x84=0.84x=3.231.52+2x=53+2x=53+2x3=532x2=22x=144.7x=1.9x+74.7x1.9x=1.9x1.9x+72.8x=72.8x2.8=72.8x=2.5512.6x+4.82=636.3x+4.8=636.3x+4.86.3=636.3x+4.8=10 x+4.84.8=104.8x=5.2；612.5+4x=21.712.5+4x12.5=21.712.54x4=9.24x=2.3713.5x8.5x=205x5=205x=486x8.54=206x34=206x3

6、4+34=20+346x6=546x=9936x=0.436xx=0.4x36=0.4x360.4=0.4x0.4x=90；-109.6xx=439.61x=438.6x8.6=438.5x=5；113x40.9=46.23x3.6=46.23x3.6+3.6=46.2+3.63x3=49.83x=16.6123.5x47=423.5x28=423.5x28+28=42+283.5x=703.5x3.5=703.5x=20；13x0.9x=81.90.1x=81.90.1x0.1=81.90.1x=819；143.8+5x=12.33.8+5x3.8=12.33.85x=8.55x5=8.55

7、x=1.7；1540.3+x=6.840.3+x4=6.840.3+x=1.70.3+x0.3=1.70.3x=1.4168x1.6x=19.26.4x=19.2，6.4x6.4=19.26.4，x=3；17x1.8=1.62x1.81.8=1.621.8，x=2.916；1822.52+5x=135，45+5x45=13545，5x5=905，x=18191.4x+9.8=22.4，优选-.1.4x+9.89.8=22.49.8，1.4x=12.6，1.4x1.4=12.61.4，x=9；202x3=11.6，2x6=11.6，2x6+6=11.6+6，2x=17.6，2x2=17.62，x

8、=8.8；4.5+x4.5=6.54.5，x=2297x29=80，7x18=80，7x18+18=80+18，7x=98，7x7=987，x=14；3013x7.5x=18.7，137.5x=18.7，21684.4x=24，684.4x+4.4x=24+4.4x，24+4.4x=68，24+4.4x24=6824，4.4x=44，4.4x4.4=444.4，x=10221.685x=2.312.85x+5x=2.3+5x2.3+5x2.3=12.82.35x5=10.55x=2.1；232.5x20=162.5x2020=16202.5x2.5=3202.5x=128；246.2xx=41

9、.65.2x=41.65.2x5.2=41.65.2x=8；25x0.5=48.62x0.5=97.2x0.50.5=97.20.5x=48.6265X7.8=20.2，5x7.8+7.8=20.2+7.8，5x5=285，x=5.6；272.5XX=1.8，1.5x1.5=1.81.5，x=1.2；28 4.5+X2=13，4.5+x22=132，-5.5x=18.7，5.5x5.5=18.75.5，x=3.4；31 x+126=108，x+1266=1086，x+12=18，x+1212=1812，x=6324x+30.7=6.54x+2.1=6.54x+2.12.1=6.52.14x=4

10、.44x4=4.44x=1.1332x0.5=1.62x1=1.62x1+1=1.6+12x=2.62x2=2.62x=1.3343x2.34=4.9147.02x=4.9147.02x7.02=4.9147.02x=0.7351.44x=0.41.44xx=0.4x0.4x=1.440.4x0.4=1.440.4x=3.6362x+6=12.52x+66=12.56优选-.2x2=6.52x=3.25；372.5xx=1.21.5x=1.21.5x1.5=1.21.5x=0.8；38 4.5+x2=634.5+x22=6324.5+x4.5=31.54.5x=27；392x2.510=152

11、x25+25=15+252x2=402x=20403.85+1.5x=6.13.85+1.5x=6.13.853.85+1.5x=6.13.851.5x=2.251.5x1.5=2.251.5x=1.54113x+2.5=16913x+2.513=16913x+2.5=13x+2.52.5=132.5x=11.5422x2+1.8=3.62x0.2=3.62x+0.20.2=3.6+0.22x=3.82x2=3.82x=1.9437x1.2=3.577x1.27=3.577x1.2=0.51x+1.21.2=1.2+0.51x=1.71442+1.82x=3.63.82x+2x=3.6+2x3

12、.83.6=3.6+2x3.60.22=2x2x=0.1；-457x0.3=4.27x0.30.3=4.20.37x7=1.267x=0.18；466x+4x11=32.910 x11+11=32.9+1110 x10=43.910 x=4.39；477x1.2=2.877x1.27=2.877x1.2+1.2=0.41+1.2x=1.61482.4+3.4x=5.82.4+3.4x2.4=5.82.43.4x=3.43.4x3.4=3.43.4x=1；495x1.2=355x1.25=355x1.2=7x1.2+1.2=7+1.2x=8.2；502.5x+51=1782.5x+51=1362

13、.5x+5151=136512.5x=852.5x2.5=852.5x=34512.4x+1.6x=2.24x=2.24x4=2.24x=0.55；528x6.2=41.68x6.28=41.68x6.2+6.2=5.2+6.2x=11.4530.5x0.5=7.50.5x0.50.5=7.50.5x0.5=15x0.5+0.5=15+0.5优选-.x=15.5；54 9x+1.5+7x5=5.116x+1.55=5.116x+1.555=5.1516x+1.5=25.516x+1.51.5=25.51.516x=2416x16=2416x=1.5；553x+7=29.53x+3.53=21.

14、63x+3.53.5=7.23.5x=3.7；633x54=136.53x54+54=136.5+543x3=190.53x=63.5；64x0.36x=3.20.64x=3.23x+77=29.573x=22.53x3=22.53x=7.5565x2.81.2=1.045x3.36=1.045x3.36+3.36=1.04+3.365x=4.45x5=4.45x=0.88574x+6x=28.510 x=28.810 x10=28.510 x=2.85582.38x+9.8=33.62.38x+9.89.8=33.69.82.38x2.38=23.82.38x=10592x3=10.62x3

15、2=10.62x3+3=5.3+3x=8.3；6013xx=14.412x=14.412x12=14.412x=1.2；61681.1x=24681.1x+1.1x=24+1.1x6824=24+1.1x24441.1=1.1x1.1x=40623x+3.5=21.6-0.64x0.64=3.20.64x=5；654x+2.84=19.324x+11.211.2=19.3211.24x4=8.124x=2.03664x5.2=5.24x5.2+5.2=5.2+5.24x=10.44x4=10.44x=2.6；674.8x+2.6x=3.77.4x=3.77.4x7.4=3.77.4x=0.5；

16、683x+6.42=50.33x+12.8=50.33x+12.812.8=50.312.83x=37.53x3=37.53x=12.5692.7x1.8=1.2x+2.7，2.7x1.8+1.8=1.2x+2.7+1.8，2.7x1.2x=1.2x+4.51.2x，1.5x1.5=4.51.5，x=3；70856x+0.7=10 x+0.5，830 x3.5=10 x+0.5，4.530 x+30 x=10 x+0.5+30 x，4.50.5=40 x0.5，440=40 x40，优选-.x=0.1；717x0.7=1.3，7x0.7+0.7=1.3+0.7，7xx=2x，72=2x2，x=

17、3.5；72 5.9+x3+16=30，5.9+x3+1616=3016，5.9+x33=143，5.9+x5.9=425.9，x=36.1730.5654x=0.4，2.84x=0.4，2.84x+4x=0.4+4x，0.4+4x=2.8，0.4+4x0.4=2.80.4，4x=2.4，4x4=2.44，x=0.6；744x0.5=9.6，4x2=9.6，4x2+2=9.6+2，4x=11.6，4x4=11.64，x=2.9752x+1.7=9.22x+1.72=9.22x+1.7=4.6x+1.71.7=4.61.7x=2.9768x4x=0.644x=0.644x4=0.644x=0.1

18、6772x0.24=0.122x0.24+0.24=0.12+0.242x=0.362x2=0.362x=0.1878 3.82x=14.4-1.8x=14.41.8x1.8=14.41.8x=8796416X=56.86416X+16X=56.8+16X16X+56.8=6416X+56.856.8=6456.816X=7.216X16=7.216X=0.45；808.6X2.6X=36.66X=36.66X6=36.66X=6.1；812.2X+8=222.2X+82.2=222.2X+8=10X+88=108X=2；82640.6X=6.36240.6X=6.36240.6X+0.6X=

19、6.36+0.6X0.6X+6.36=240.6X+6.366.36=246.360.6X=17.640.6X0.6=17.640.6X=29.4830.031505x=3.24.55x=3.2，4.55x+5x=3.2+5x，4.53.2=3.2+5x3.2，1.35=5x5，x=0.26；8445.34X=35.7，45.34X+4X=35.7+4X，35.7+4X=45.3，35.7+4X35.7=45.335.7，4X=9.6，4X4=9.64，X=2.4；8535.4+X6=7.2，优选-.35.4+3X66=7.26，16.2+3X=43.2，16.2+3X16.2=43.216.2，3X=27，3X3=273，X=9；865.9X+7=8.7X，5.9X+77=8.7X7，5.9X=8.7X7，5.9X5.9X=8.7X75.9X，2.8X7=0，2.8X7+7=0+7，2.8X=7，2.8X2.8=72.8，X=2.5873+0.6x=4.323+0.6x3=4.323，0.6x0.6=1.320.6，x=2.2；880.6y0.4=6，0.6y0.40.6=60.6，y0.4+0.4=10+0.4，y=10.4-优选