《人教版小學(xué)五年級(jí)上冊(cè)數(shù)學(xué)每天晚上計(jì)算練習(xí)題全套.doc》由會(huì)員分享，可在線閱讀，更多相關(guān)《人教版小學(xué)五年級(jí)上冊(cè)數(shù)學(xué)每天晚上計(jì)算練習(xí)題全套.doc（43頁(yè)珍藏版）》請(qǐng)?jiān)谘b配圖網(wǎng)上搜索。

1、五年級(jí)上冊(cè)數(shù)學(xué)每天晚上計(jì)算練習(xí)題（1） 下面各題，怎樣簡(jiǎn)便就怎樣算. 0.254.784 0.65202 4.21.69 2.5（0.774） 7.28.4+2.88.4 2.96401010.45 2.7399 2.021.08 4.8 0.25 0.780.98 0.52.338 1.5105 0.32.50.4 1.22.5+0.82.52.028.5 0.80.250.412.5 1.250.70.8 6.13.6+3.63.9 1040.25 3.550.50.6 7.49101 6.81.99-6.80.99 1.780.7+1.789.3 1.030.24 7.9101-7.9

2、4.40.256 9.94.8 7.5+2.25+2.5 9.2813-9.284+9.28 1.252.4 1.012.5-2.5 0.561.25 0.7212.5 1.52.05 3.21.03 2.025.2 2.532 5.32.02 12.5320.25 98.498+98.42 6.64 43.529 18.927 1.35153.6452 37.568 28.611 20.4241.2618 2415 15.612 328161.3527 0.64619 5.046 76.5450.8428 2.190.3 5.583.1 0.843.57.050.47 51.30.27 25

3、.60.032 5.880.56260.13 1.441.8 11.72.6 4.483.20.5440.16 2.380.34 62.42.6 7.650.8512.60.28 4.681.2 2.380.34 5.20.321610.46 5.980.23 19.765.2 10.84.58.912.3 3.64.13 322.13 0.382.7 3.52.2 8.812.5 1.256.4 0.450.6 5.51.08 0.460.85 1.860.9 8.491.2 3.42.5 2.61.08 0.290.03 1.8203 0.370.43 270.47 4.20.002 0.

4、0720.18 0.580.085 0.188.45 0.392.2 0.370.09 0.260.52 3.8420 165.08 0.0494.5 1.20.45 0.081.2 1.054.2 0.261.6 3.182.2 8.20.9 0.468.30.561.8 0.765.9 1.030.24 0.722.51.52.05 3.21.03 2.025.2 5.30.02 7.84.06 3.22.05 9.420.16 1.20.108 34.515 7.839 13.52.7 3.756 4.08 8 14.217 6.314 76.54.5 7.215 34.51.5 4.2

5、30 1.262.89.11.4 43.52.9 28.61.1 11.72.6 1.80.23 0.370.04 1.060.2570.88 0.60.039 2.70.432.380.34 2775 1.0845 88.4172.114 1610.46 13.50.03 5.20.32 0.677.5 9.120.8 8.360.25 1.230.03 1.890.54 7.10.25 0.512.2 0.680.95 0.254.784 0.65202 4.21.69 2.5（0.774） 7.28.4+2.88.4 1.5105 1010.45 2.7399 2.021.08 4.8

6、0.25 0.780.98 0.52.338 0.32.50.4 1.22.5+0.82.5 7.491012.028.5 0.80.250.412.5 0.7212.5 1.250.70.8 6.13.6+3.63.9 2.9640 1040.25 3.550.50.6 5.32.026.81.99-6.80.99 1.780.7+1.789.3 7.9101-7.9 4.40.256 9.94.8 7.5+2.25+2.59.2813-9.284+9.28 1.252.4 1.012.5-2.50.561.25 1.030.24 12.5320.25 1.52.05 3.21.03 2.0

7、25.2 1.256.4 98.498+98.42 3.52.2 2.532 8.812.5 0.6999+0.691.251.681.6 2.542.54 569956101 2.5（0.778） 7.29.4+2.89.4 1.010.45 2.739.9 2.023.6 4.8 1.25 0.780.99 0.52.336 1.51.05 0.3250.4 1.225+0.8252.024.5 80.250.41.25 1.787+1.7893 1.250.78 6.136+363.9 2.5 2.9640 1.040.25 3.5550.6 7.491.01 681.99-680.99

8、 79101-79 4.4256 7.5+2.25+2.5 9.284+9.28 6 1252.4 1012.5-25 0.5612.5 0.72125 1.032.4 152.05 3.22.3 2.023.2 6.32.02 12.53.20.25 12.56.4 98.49.8+98.40.2 3.52.02 0.2532 8.8125 五年級(jí)上冊(cè)數(shù)學(xué)每天計(jì)算練習(xí)題（8） （1）0.438.5 1.823 0.370.4 1.062570.88 0.60.39 270.43 25.26 （2） 0.04945 7.062.4 720.81+10.47.062.4-5.7 0.0340.5

9、0.6 1020.451.823 0.370.4 1.0625 （3）6.40.02 0.760.05 0.831.04 3.74.5 0.140.23 1.4232.60.35 5.60.02 0.526.4（4）4.25.15 0.9321 0.027+9.90.27 1.2542.58 9.99.81 0.370.4 （5）1.52.05 3.21.03 2.025.2 5.30.02 7.84.06 3.22.05 9.420.16 1.20.10五年級(jí)上冊(cè)數(shù)學(xué)每天計(jì)算練習(xí)題（8） 五年級(jí)上冊(cè)數(shù)學(xué)每天計(jì)算練習(xí)題（9） （1）0.6164 43.52.9 18.92.7 1.351.50

10、.3645.2 37.56.8 28.61.1 20.42.4（2）1.261.8 241.5 0.1561.2 3281.61.352.7 0.6461.9 5.040.6 0.76545（3）0.842.8 2.193 5.5831 0.84357.050.47 51.30.27 25.60.032 5.8856（4）260.13 1.441.8 11.72.6 4.483.2 0.54416 2.3834 62.42.6 7.6585（5）12.628 4.6812 2.380.34 5.23216146 5.9823 19.7652 10.8458.912.3 3.64.13 322.

11、13 0.382.7 五年級(jí)上冊(cè)數(shù)學(xué)每天計(jì)算練習(xí)題（10）1. 3.6452 12.3 3 4.524 1.230.3 0.1251.250.48 (13.7-6.75)8.4 4.89(5.2+6.4) 8.91.2-7.5 2 0.13527 0.6721.6 2614.55046 0.76545 0.84284.89(5.2+6.4) 8.91.2-7.5 3. 19.40.12 26.370.31 4550.38273.7+3.773 0.1258.8 8.499+8.42.380.34 5.2324. 0.15612 32816 50.40.627.31.3 0.2730.013 0

12、.191.270.50.47 84355. 2.731.3 0.2415 0.5132720424 61.64 0.21931.2542.58 9.99.81 五年級(jí)上冊(cè)數(shù)學(xué)每天計(jì)算練習(xí)題（11）1. 3.6452 12.3 3 4.524 68.49 28.9818 45.5657.62+7.6299 80.691.2582. 8.412 49.616 9.24426.4414 16.926 32.1151.252.782.7 10.18.93. 1.3527 0.67216 261455.046 76.545 0.84280.9642.5 6.90.315.24. 7.650.85 12.

13、60.28 62.42.60.5440.16 11.72.6 1.441.80.75180.15 2.070.230.455. 19.412 26.3731 45.5385.980.23 19.765.2 6.210.0321.360.8-12.9 7.28+3.22.5五年級(jí)數(shù)學(xué)每天計(jì)算題（12）1. x1.8=6 1.2 x=60 4x=38-145x-4=36 7x+10=24 2x+4.8=104（6 x+3）=60 2 x+234=1342. 4x-3.7=8.7 25x-70=80 14+9x=508x-414=0 5x+357=40 2.40.3+6 x=508x-3x=105

14、（3x-4）5=43. 15x+3.812=87.6 3x-0.53=13.5 6x-2x=12.82.8x-5.43=6.6 4.2x+x=104 5x-2x=2.72x+1.5 x=17.5 8x-3x404. x+4x=30 10 x-3.5x=52 6(x+15)=2404.8(x-2.5)=19.2 9(x+3.5)=41.4 9(6.4+x)=723 x+ x+6=26 x4.5=1.25. 3.5(3.5+ x)=21 14(x-25)=112 1.5 x=36x2.4=25 5.4 x+8=18.8 x-28=52x-8=16 6.3x=7五年級(jí)數(shù)學(xué)每天計(jì)算題（13）1. x+

15、13=33 7（x-20）=140 1.8 x=54 6.7 x-60.3=6.7 9 x+ x=0 x-2=122. （2.8+ x）2=10.4 （1+2.4）x=5.1 2（x-2.6）=8 5（x+1.5）=17.5 8（x-6.2）=41.6 （x-3）2=7.53. x+4.8=7.2 x-6.5=3.2 x8=0.46 x+18=48 3（x+2.1）=10.5 12 x-9 x=8.73.8+ x=6.3 x-7.9=2.64. 3.4 x-48=26.8 2 x-97=34.2 13(x+5)=169 x3=1.2x20=90 9x =45. 13.2 x+9 x=33.3

16、8 x-3 x=105 5.4 x+ x12.8 x-0.36 x=163.8+ x=6.3 x-7.9= 2.6 五年級(jí)數(shù)學(xué)每天計(jì)算題（14）1. X+4.7=9.6 x-28=52 1.5 x=3654- x =24 7x+30=79 126 x=428.4x -6x=7.2 7（x-4.8）=282. 8（3x-55）=40 61.8-6x=54 6.7x-60.3=6.79+4x=40 9.4x -0.4x=16.2 112-4x =2012x+34x =13.8 14（x-25）=1123. x-0.45 x = 11 6x +9x=1.5 5.4x +x=6.45（x+5.1）=4

17、2.5 29+6x=36.2 56x7+x=13.5x8=72 2（x+6）=12 4. 4.1x+1.9x=18 x-4.7=0.76 0.64 x=0.16 X+409=655 2（x-6.2）=24.6 4 x-14.8=25.6 5（x+5.1）=42.5 0.6 x+0.9 x=1.55. 3x=132 x4=4.8 x 16=2407x =9.1 x 0.4=2.5 7.5+x =12.84x -26=70 2x +4=30五年級(jí)數(shù)學(xué)每天計(jì)算題（15）1. X+47=96 x-2.8=5.2 1.5 x=3.654.- x =2.4 4.2- X=0.9 12.6 x=4.28.4

18、 -6x=7.2 7（x-4.8）=562. 2（3x-55）=20 61.8-12x=54 13.4x-60.3=6.79+4x=40 9.4x -0.4x=16.2 112-4x =2012x+34x =138 7（x-25）=563. x-0.45 x = 1.1 0.6x +0.9x=1.5 128 x =64（x+5.1）=8.05 2.9+6x=3.62 5.6x7+x=1.35x8=72 2（x+6）=12 4. 4.1x+1.9x=18 x-4.7=0.76 0.64 x=0.32 X+409=655 2（x-6.2）=24.6 8x-14.8=25.6 0. 5（x+5.1）

19、=42.5 1.2 x+1.8 x=35. 3x=132 x4=4.8 x 16=2400.7x =9.1 4 x =2.5 7.5-x =2.8114 - x =70 98-2x =30五年級(jí)上冊(cè)數(shù)學(xué)每天計(jì)算練習(xí)題（16） 下面各題，怎樣簡(jiǎn)便就怎樣算.1 、 0.254.784 0.65202 4.21.69 2.5（0.774） 7.28.4+2.88.4 1010.45 2.7399 2.021.08 2. 4.8 0.25 0.780.98 0.52.338 1.5105 0.32.50.4 1.22.5+0.82.52.028.5 0.80.250.412.5 3. 1.250.70

20、.8 6.13.6+3.63.9 2.9640 1040.25 3.550.50.6 7.49101 6.81.99-6.80.99 1.780.7+1.789.3 4. 7.9101-7.9 4.40.256 9.94.8 7.5+2.25+2.5 9.2813-9.284+9.28 1.252.4 1.012.5-2.50.561.25 0.7212.5 1.030.24 5. 1.52.05 3.21.03 2.025.2 5.32.02 12.5320.25 1.256.4 98.498+98.42 3.52.2 2.532 8.812.5五年級(jí)上冊(cè)數(shù)學(xué)每天計(jì)算練習(xí)題（17）1. 3.

21、6452 12.3 3 4.524 1.230.3 0.1251.250.48 (13.7-6.75)8.4 4.89(5.2+6.4) 8.91.2-7.5 2 0.13527 0.6721.6 2614.55046 0.76545 0.84284.89(5.2+6.4) 8.91.2-7.5 3. 19.40.12 26.370.31 4550.38273.7+3.773 0.1258.8 8.499+8.42.380.34 5.2324. 0.15612 32816 50.40.627.31.3 0.2730.013 0.191.270.50.47 84355. 2.731.3 0.24

22、15 0.5132720424 61.64 0.21931.2542.58 9.99.81 五年級(jí)上冊(cè)數(shù)學(xué)每天計(jì)算練習(xí)題（18）1. 3.6452 12.3 3 4.524 68.49 28.9818 45.5657.62+7.6299 80.691.2582. 8.412 49.616 9.24426.4414 16.926 32.1151.252.782.7 10.18.93. 1.3527 0.67216 261455.046 76.545 0.84280.9642.5 6.90.315.24. 7.650.85 12.60.28 62.42.60.5440.16 11.72.6 1.4

23、41.80.75180.15 2.070.230.455. 19.412 26.3731 45.5385.980.23 19.765.2 6.210.0321.360.8-12.9 7.28+3.22.5五年級(jí)上冊(cè)數(shù)學(xué)每天計(jì)算練習(xí)題（19） 下面各題，怎樣簡(jiǎn)便就怎樣算.1 、 0.254.784 0.65202 4.21.69 2.5（0.774） 7.28.4+2.88.4 1010.45 2.7399 2.021.08 2. 4.8 0.25 0.780.98 0.52.338 1.5105 0.32.50.4 1.22.5+0.82.52.028.5 0.80.250.412.5 3.

24、1.250.70.8 6.13.6+3.63.9 2.9640 1040.25 3.550.50.6 7.49101 6.81.99-6.80.99 1.780.7+1.789.3 4. 7.9101-7.9 4.40.256 9.94.8 7.5+2.25+2.5 9.2813-9.284+9.28 1.252.4 1.012.5-2.50.561.25 0.7212.5 1.030.24 5. 1.52.05 3.21.03 2.025.2 5.32.02 12.5320.25 1.256.4 98.498+98.42 3.52.2 2.532 8.812.58. 254.784 0.65

25、20.1 150.42.5273.7+3.773 0.1258.8 8.499+8.49. 0.1251.250.48 (13.7-6.75)8.4 4.89(5.2+6.4) 8.91.2-7.5 72-0.1410. 91.257 2.12.4 74.10.135.635 630.09 0.0280.0711. 3.6452 12.3 3 4.524 68.49 28.9818 45.56512. 8.412 49.616 9.24426.4414 16.926 32.11513. 1.3527 0.67216 261455.046 76.545 0.842814. 7.650.85 12

26、.60.28 62.42.60.5440.16 11.72.6 1.441.815. 19.412 26.3731 45.5385.980.23 19.765.2 6.210.0316. 211.4 8.841.7 18.24182.4 1.80.24 13.53017. 27.31.3 0.2730.013 0.191.24.25.15 0.9321 0.027+9.90.2718. 1.2542.58 9.99.81 0.420.0615.869.3-68.315.8 2.080.26 78.60.619. 0.6752.7 9.80.28 13.60.0430.40.32 5.10.85

27、 240.03220. 0.3840.24 18.20.65 510.347.863.5 14.322.7 281821、0.984 0.0984 1.025 4.284 0.3840.24 18.20.65 22、 510.34 0.36369 9.60.03 0.40.02 6.80.2 13.60.0423、9.80.28 0.8525 240.032 5185 5.18.5 2.560.32 24、 5.040.24 0.5042.4 62.10.3 5.130.27 4.681.2 2.241.425、32.424 4.9533 80.53.5 10.845 288448 5.409

28、 26、 3.3684 31.224 1.8844 1.5624 13.527 2614527、4.590.34 0.67216 1.40.07 35.357 0.968 0.928 28、 26.46 26.76 3.2115 7.8358 36.48 0.94529、 6.480 4.250.05 64.414 45.565 4.2015 0.94242 30、 2.349 23.49 0.6416 6.416 2.9913 29.91.30.0494.5 7.062.4 720.81+10.47.062.4 0.0340.5 1.020.455. 4.80.25 2.330.54 1.5

29、1051.20.25+0.80.25 20.340.15 3.5 103 五年級(jí)下冊(cè)數(shù)學(xué)計(jì)算練習(xí)題 姓名 筆算下面各題31、2.90.13 564 5.64 68.49 1.263 45.24 32、 4.9616 2.8981.8 18.9504 7.10.25 5.12.2 0.5982.333、1.9760.52 1.080.45 0.2114 8.840.17 0.6210.03 1.80.24 34、13.50.03 27.31.3 0.5441.6 6.2426 1.441.8 11.72.635、12.60.28 7.650.85 4.352.9 1.892.7 13.51.5

30、2.861.1 36、2.0424 36.45.2 1.561.2 32816 13.527 1.2618 37、 2415 1.812 22.44 78.30.9 40.88 5.40.6 38、 63140 721.5 35.560.7 12.360.4 18.279 24.48839、12.90.3 1.2930 0.1290.03 45.180.9 28.840.4 2.8840.04 40、288.440 13.60.04 194.454 42.9214.8 7.50.24 4.240.441、3.120.04 18.240.06 21.350.7 2.4320.08 32.52.5

31、 491.4 解方程 姓名 1. x5.2=10.8 x+3.2=4.6 x-1.8=4x-2=15 1.6 x=6.4 x7=0.32. x3=2.1 3 x=18 x+0.64=14.14X+32=76 12- x=4 3x=1.53. x+0.3=1.8 3+ x=5.4 x-1.5=4x-6=7.6 5x=1.5 0.2 x=64. x1.1=3 x5=15 2x-20=44x-39=29 2x-7.5=8.5 16+8x=405. 3x+6=18 5x+3=1428 1.8x+32=98.62x-16=72 2x+30=110 4x+812=44006.(x-3)2=7.5 8(x-

32、6.2)=41.6 5(x+1.5)=17.52(x-2.6)=8 x-0.36x=16 5.4 x+ x=12.87. 8x-3x=105 13.2x+9x=33.3 6x+9x=1.53(x+2.1)=10.5 12 x-9x=8.7 6x+18=488. x8=0.4 x-6.5=3.2 x+4.8=7.23.8+x=6.3 2.5x=14 3.4x-48=26.89.42x+25x=134 x-7.9=2.6 x3=1.22x-97=34.2 13(x+5)=169 x1.44=0.4 10. 3.85+1.5x=6.1 6x-0.9=4.5 x+12=20X-8=18 6+x=40

33、x-0.8=2.611. 2.9+x=6 x-7=9.8 x+80=1253.2+ x=6.6 x-5.3=4 2.7+x=3.2+1.5 12. 5x=45 x6=7 8x=23+4136x=108 x20=90 x9=413. x1.5=4 x6=5.4 2.5x=17.5x3.2=2.5 x5=4.2 8.8+x=2014. x1.8=6 1.2 x=60 4x=38-145x-4=36 7x+10=24 2x+4.8=1015.4x-3.7=8.7 25x-70=80 14+9x=508x-414=0 5x+357=40 2.40.3+6 x=5016.15x+3.812=87.6 3

34、x-0.53=13.5 6x-2x=12.82.8x-5.43=6.6 4.2x+x=104 5x-2x=2.717. x+4x=30 10 x-3.5x=52 6(x+15)=2404.8(x-2.5)=19.2 9(x+3.5)=41.4 9(6.4+x)=7218. 3.5(3.5+ x)=21 14(x-25)=112 1.5 x=36x2.4=25 5.4 x+8=18.8 x-28=5219. x+4.7=9.6 15.6+2x=23.4 4x+2.54=268.4x-6x=7.2 7(x-4.8)=28 8x-624=020. 3x+2.5x=69.3 0.2x+6=9 3x-7

35、8=723.6x-x=5.85 4（x-6）=120 24-x=17解方程 姓名 1. x5.2=10.8 x+3.2=4.6 x-1.8=4x-2=15 1.6 x=6.4 x7=0.32. x3=2.1 3 x=18 x+0.64=14.14X+32=76 12- x=4 3x=1.53. x+0.3=1.8 3+ x=5.4 x-1.5=4x-6=7.6 5x=1.5 0.2 x=64. x1.1=3 x5=15 2x-20=44x-39=29 2x-7.5=8.5 16+8x=405. 3x+6=18 5x+3=1428 1.8x+32=98.62x-16=72 2x+30=110 4

36、x+812=44006.(x-3)2=7.5 8(x-6.2)=41.6 5(x+1.5)=17.52(x-2.6)=8 x-0.36x=16 5.4 x+ x=12.87. 8x-3x=105 13.2x+9x=33.3 6x+9x=1.53(x+2.1)=10.5 12 x-9x=8.7 6x+18=488. x8=0.4 x-6.5=3.2 x+4.8=7.23.8+x=6.3 2.5x=14 3.4x-48=26.89.42x+25x=134 x-7.9=2.6 x3=1.22x-97=34.2 13(x+5)=169 x1.44=0.4 10. 3.85+1.5x=6.1 6x-0.

37、9=4.5 x+12=20X-8=18 6+x=40 x-0.8=2.611. 2.9+x=6 x-7=9.8 x+80=1253.2+ x=6.6 x-5.3=4 2.7+x=3.2+1.5 12. 5x=45 x6=7 8x=23+4136x=108 x20=90 x9=413. x1.5=4 x6=5.4 2.5x=17.5x3.2=2.5 x5=4.2 8.8+x=2014. x1.8=6 1.2 x=60 4x=38-145x-4=36 7x+10=24 2x+4.8=1015.4x-3.7=8.7 25x-70=80 14+9x=508x-414=0 5x+357=40 2.40.

38、3+6 x=5016.15x+3.812=87.6 3x-0.53=13.5 6x-2x=12.82.8x-5.43=6.6 4.2x+x=104 5x-2x=2.717. x+4x=30 10 x-3.5x=52 6(x+15)=2404.8(x-2.5)=19.2 9(x+3.5)=41.4 9(6.4+x)=7218. 3.5(3.5+ x)=21 14(x-25)=112 1.5 x=36x2.4=25 5.4 x+8=18.8 x-28=5219. x+4.7=9.6 15.6+2x=23.4 4x+2.54=268.4x-6x=7.2 7(x-4.8)=28 8x-624=020.

39、 3x+2.5x=69.3 0.2x+6=9 3x-78=723.6x-x=5.85 4（x-6）=120 24-x=17解方程 姓名 1. x5.2=10.8 x+3.2=4.6 x-1.8=4x-2=15 1.6 x=6.4 x7=0.32. x3=2.1 3 x=18 x+0.64=14.14X+32=76 12- x=4 3x=1.53. x+0.3=1.8 3+ x=5.4 x-1.5=4x-6=7.6 5x=1.5 0.2 x=64. x1.1=3 x5=15 2x-20=44x-39=29 2x-7.5=8.5 16+8x=405. 3x+6=18 5x+3=1428 1.8x+

40、32=98.62x-16=72 2x+30=110 4x+812=44006.(x-3)2=7.5 8(x-6.2)=41.6 5(x+1.5)=17.52(x-2.6)=8 x-0.36x=16 5.4 x+ x=12.87. 8x-3x=105 13.2x+9x=33.3 6x+9x=1.53(x+2.1)=10.5 12 x-9x=8.7 6x+18=488. x8=0.4 x-6.5=3.2 x+4.8=7.23.8+x=6.3 2.5x=14 3.4x-48=26.89.42x+25x=134 x-7.9=2.6 x3=1.22x-97=34.2 13(x+5)=169 x1.44=

41、0.4 10. 3.85+1.5x=6.1 6x-0.9=4.5 x+12=20X-8=18 6+x=40 x-0.8=2.611. 2.9+x=6 x-7=9.8 x+80=1253.2+ x=6.6 x-5.3=4 2.7+x=3.2+1.5 12. 5x=45 x6=7 8x=23+4136x=108 x20=90 x9=413. x1.5=4 x6=5.4 2.5x=17.5x3.2=2.5 x5=4.2 8.8+x=20五年級(jí)數(shù)學(xué)每天計(jì)算題（12）14. x1.8=6 1.2 x=60 4x=38-145x-4=36 7x+10=24 2x+4.8=1015.4x-3.7=8.7 2

42、5x-70=80 14+9x=508x-414=0 5x+357=40 2.40.3+6 x=5016.15x+3.812=87.6 3x-0.53=13.5 6x-2x=12.82.8x-5.43=6.6 4.2x+x=104 5x-2x=2.717. x+4x=30 10 x-3.5x=52 6(x+15)=2404.8(x-2.5)=19.2 9(x+3.5)=41.4 9(6.4+x)=7218. 3.5(3.5+ x)=21 14(x-25)=112 1.5 x=36x2.4=25 5.4 x+8=18.8 x-28=5219. x+4.7=9.6 15.6+2x=23.4 4x+2.54=268.4x-6x=7.2 7(x-4.8)=28 8x-624=020. 3x+2.5x=69.3 0.2x+6=9 3x-78=723.6x-x=5.85 4（x-6）=120 24-x=17