五年级解方程练习题50题及答案ok.docx

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1、五年级解方程练习题50题及答案Ok五年级解方程50题有答案(2)2(X+X+0.5)=9.8(ll)91x=L3(3)25000+x=6x(12)X+8.3=10.7(4)3200=440+5X+X(13)15x=3(5)X-0.8X=6(14)3-8=16(6)12-8x=4.8(15)3x+9=27(7)7.5+2X=15(16)18(-2)=270(17)12x=300-4x(8)1.2x=81.6(18)7x+5.3=7.4(19)3x5=4.8(34)x5+9=21(25)0.5x+8=43(35)48-27+5x=31(36)10.5+x+21=56(26)6-3x=18(37)x

2、+2x+18=78(27)7(6.5+x)=87.5(28)0.273x=0.35(38)(200-)5=30(29)1.8x=0.972(39)(-140)70=4(30)x0.756=90(40)20-9x=2(31)O.l(x+6)=3.30.4(41)x+19.8=25.8(32)(27.5-3.5)x=4(42)5.6x=33.6(33)9-40=5(43)9.8-=3.8(46)5(x+8)=102(50)3.5-5x=2(47)x+3x+10=70(48) 3(x+3)=50-+3(1) (0.5+x)+x=9.820.5+2x=4.9O. 5+2-0. 5=4.9-0.52x=

3、4,42x2=442X=2.2(2) 2(X+X+0. 5)=9.82x+2x+l=9.84x+l-l=9.8-1五年级解方程50题答案4x4=8.84X=2,2(3) 25000+x=6x25000+-=6-5x=250005x5=250005X=5000(4) 3200=440+5X+X6x+440=32006x+450-450=3200-440X=460(5) X-0.8X=60.2x=60.2x0.2=60. 2X=30(6)12-8x=4.84x=4.84x4=4.84X=L 2(7) 7.5+2X=152x+7.5-7.5=15-7.52x=7. 52x2=7. 52X=3.75(

4、8) 1. 2x=81.61. 2xl. 2=81.61.2X=68X=3.8(10)-0.7x=3.6O.3x=3.6O.3x0.3=3.60.3X=12(ll)91x=1.391xx=1.3x1.3x=911.3xl.3=911.3X=70(12) X+8.3=10.7X+8.3-8.3=10.7-8.3X=2,4(13) 15x=315x15=315X=O.23x=243x3=243X=8(15) 3x+9=273x+9-9=27-93x=183x3=1833x=6(16) 18(-2)=27018-36=27018-36+36=270+3618x=30618x18=30618X=17(

5、17) 12x=300-4x12x+4x=300-4x+4x16x=300(18) 7x+5.3=7.47x+5.3-5.3=7.4-5.37x=2.17x7=2,l7X=O.3(19) 3x5=4.83x55=4,853x=243x3=243X=8(20) 30x+25=8530x+25-25=85-2530x=6030xx=60x30=60x60x60=3060X=O.53x+l. 5-1.5=21-1.53x=19. 53x3=19. 53X=6.5(25) 0.5x+8=43O.5x+8-8=43-80.5x=350.5x0.5=350. 5X=70(26) 6-3x=183x=183

6、x3=183X=6(27) 7(6.5+x)=87.57x+45.5=87.57x+45.5-45. 5=87.5-45.57x=4211.2=6+2x2x+6-6=ll.2-62x=5.22x2=5.22X=2.6(22) 6-12.83=0.066-38.4=0.066x=38.466x6=38.466X=6.41(23) 41Q-3x=170410-3x+3x=170+3x170+3x=4103x+170-170=410-1703x=2403x3=2403X=80(28) 0.273x=0.35x=O.2730.35X=O.78(29) 1.8x=0.9721.8x1.8=0.9721.

7、8X=O.54(30) x0.756=90x0.756O.756=90O.756X=68.04(31) 0.1(x+6)=3.30.4O.lx+0.6=1.32O.lx+0.6-0.6=1.32-0.6O.Ix=O.72O.lxO.1=0.720.124x=4x=244X=6(33) 9-40=59-40+40=5+409x=459x9=459X=5(34) x5+9=21x5+9-9=21-9x5=12x55=125X=60(35) 48-27+5x=315x+21-21=31-215x=105x5=105x+31.5-31.5=56-31.5x=24.5(37) x+2x+18=783x+

8、18-18=78-183x=603x3=603X=20(38) (200-)5=30(200-)55=305200-=150200-x+x=150+x150+x=200X+150-150=20Q-150X=50(39) (-140)70=4(-140)7070=470X=420(40) 20-9x=29x=20-29x=189x9=189X=2(41) x+19.8=25.8X+19.8-19.8=25.8-19.8X=6(42) 5.6x=33.65.6x5.6=33.65.6X=6(43) 9.8-=3.843.8- +x=3.8+x3.8+x=9.8(44) 75.6x=12.6X=75

9、.612.6X=6(45) 5x+12.5=32.35x+12.5-12.5=32.3-12.55x=19.85x5=19.85X=3.96(46) 5(x+8)=1025x+40=1025x+40-40=102-405x=625x5=625X=12.4(47) x+3x+10=704x+10=704x4=604X=15(48) 3(x+3)=50-+33x+9=53-3x+x+9-9=53-x+x-94x=444x4=444X=Il(49) 5x+15=605x+15-15=60-155x=455x5=455X=9(50) 3.5-5x=23.5-5x+5x=2+5x5x+2=3.5第io页共ii页5x5=1.55X=O.3