五年级解方程练习题50题及答案ok.docx
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(11)91÷x=13(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)3x÷5=4.8(34)x÷5+9=21(25)0.5x+8=43(35)48-27+5x=31(36)10.5+x+21=56(26)6-3x=18(37)x+2x+18=78(27)7(6.5+x)=87.5(28)0.273÷x=0.35(38)(200-)÷5=30(29)1.8x=0.972(39)(-140)÷70=4(30)x÷0.756=90(40)20-9x=2(31)O.1(x+6)=3.3×0.4(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=9.8÷20.5+2x=4.9O.5+2-0.5=4.9-0.52x=4,42x÷2=44÷2X=2.2(2) 2(X+X+0.5)=9.82x+2x+1=9.84x+1-1=9.8-1五年级解方程50题答案4x÷4=8.8÷4X=2,2(3) 25000+x=6x25000+-=6-5x=250005x÷5=25000÷5X=5000(4) 3200=440+5X+X6x+440=32006x+450-450=3200-440X=460(5)X-0.8X=60.2x=60.2x÷0.2=6÷0.2X=30(6)12-8x=4.84x=4.84x÷4=4.8÷4X=12(7) 7.5+2X=152x+7.5-7.5=15-7.52x=7.52x÷2=7.5÷2X=3.75(8) 1.2x=81.61.2x÷1.2=81.6÷1.2X=68X=3.8(10)-0.7x=3.6O.3x=3.6O.3x÷0.3=3.6÷0.3X=12(11)91÷x=1.391÷x×x=1.3×x1.3x=911.3x÷1.3=91÷1.3X=70(12) X+8.3=10.7X+8.3-8.3=10.7-8.3X=2,4(13) 15x=315x÷15=3÷15X=O.23x=243x÷3=24÷3X=8(15) 3x+9=273x+9-9=27-93x=183x÷3=18÷33x=6(16) 18(-2)=27018-36=27018-36+36=270+3618x=30618x÷18=306÷18X=17(17) 12x=300-4x12x+4x=300-4x+4x16x=300(18) 7x+5.3=7.47x+5.3-5.3=7.4-5.37x=2.17x÷7=2,1÷7X=O.3(19) 3x÷5=4.83x÷5×5=4,8×53x=243x÷3=24÷3X=8(20) 30÷x+25=8530÷x+25-25=85-2530÷x=6030÷x×x=60×x30=60x60x÷60=30÷60X=O.53x+1.5-1.5=21-1.53x=19.53x÷3=19.5÷3X=6.5(25) 0.5x+8=43O.5x+8-8=43-80.5x=350.5x÷0.5=35÷0.5X=70(26) 6-3x=183x=183x÷3=18÷3X=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=11.2-62x=5.22x÷2=5.2÷2X=2.6(22) 6-12.8×3=0.066-38.4=0.066x=38.466x÷6=38.46÷6X=6.41(23) 41Q-3x=170410-3x+3x=170+3x170+3x=4103x+170-170=410-1703x=2403x÷3=240÷3X=80(28) 0.273÷x=0.35x=O.273÷0.35X=O.78(29) 1.8x=0.9721.8x÷1.8=0.972÷1.8X=O.54(30) x÷0.756=90x÷0.756×O.756=90×O.756X=68.04(31) 0.1(x+6)=3.3×0.4O.1x+0.6=1.32O.1x+0.6-0.6=1.32-0.6O.Ix=O.72O.1x÷O.1=0.72÷0.124÷x=4x=24÷4X=6(33) 9-40=59-40+40=5+409x=459x÷9=45÷9X=5(34) x÷5+9=21x÷5+9-9=21-9x÷5=12x÷5×5=12×5X=60(35) 48-27+5x=315x+21-21=31-215x=105x÷5=10÷5x+31.5-31.5=56-31.5x=24.5(37) x+2x+18=783x+18-18=78-183x=603x÷3=60÷3X=20(38) (200-)÷5=30(200-)÷5×5=30×5200-=150200-x+x=150+x150+x=200X+150-150=20Q-150X=50(39) (-140)÷70=4(-140)÷70×70=4×70X=420(40) 20-9x=29x=20-29x=189x÷9=18÷9X=2(41) x+19.8=25.8X+19.8-19.8=25.8-19.8X=6(42) 5.6x=33.65.6x÷5.6=33.6÷5.6X=6(43) 9.8-=3.843.8- +x=3.8+x3.8+x=9.8(44) 75.6÷x=12.6X=75.6÷12.6X=6(45) 5x+12.5=32.35x+12.5-12.5=32.3-12.55x=19.85x÷5=19.8÷5X=3.96(46) 5(x+8)=1025x+40=1025x+40-40=102-405x=625x÷5=62÷5X=12.4(47) x+3x+10=704x+10=704x÷4=60÷4X=15(48) 3(x+3)=50-+33x+9=53-3x+x+9-9=53-x+x-94x=444x÷4=44÷4X=I1(49) 5x+15=605x+15-15=60-155x=455x÷5=45÷5X=9(50) 3.5-5x=23.5-5x+5x=2+5x5x+2=3.5第io页共ii页5x÷5=1.5÷5X=O.3
