第1页共6页五年级解方程50题有答案（1）(0.5+x)+x=9.8÷2（2）2(X+X+0.5)=9.8（3）25000+x=6x（4）3200=440+5X+X（5）X-0.8X=6(6)12x-8x=4.8(7)7.5+2X=15(8)1.2x=81.6（7）x+5.6=9.4(10)x-0.7x=3.6(11)91÷x＝1.3（12）X+8.3=10.7(13)15x＝3(14)3x－8＝16第2页共6页(15)3x+9=27(16)18(x-2)=270(17)12x=300-4x(18)7x+5.3=7.4(19)3x÷5=4.8(25)0.5x+8=43(26)6x-3x=18(27)7(6.5+x)=87.5（28）0.273÷x=0.35(29)1.8x=0.972(30)x÷0.756=90(31)0.1(x+6)=3.3×0.4(32)(27.5-3.5)÷x=4(33)9x-40=5(34)x÷5+9=21(35)48-27+5x=31(36)10.5+x+21=56第3页共6页（37）x+2x+18=78(38)(200-x)÷5=30(39)(x-140)÷70=4（40）20-9x=2(41)x+19.8=25.8(42）5.6x=33.6（43）9.8-x=3.8（44）75.6÷x=12.6（45）5x+12.5=32.3（46）5(x+8)=102（47）x+3x+10=70（48）3(x+3)=50-x+3（49）5x+15=60（50）3.5-5x=2五年级解方程50题答案（1）(0.5+x)+x=9.8÷20.5+2x=4.90.5+2x-0.5=4.9-0.5第4页共6页2x=4.42x÷2=4.4÷2X=2.2（2）2(X+X+0.5)=9.82x+2x+1=9.84x+1-1=9.8-14x=8.84x÷4=8.8÷4X=2.2（3）25000+x=6x25000+x-x=6x-x5x=250005x÷5=25000÷5X=5000（4）3200=440+5X+X6x+440=32006x+450-450=3200-4406x=27606x÷6=2760÷6X=460（5）X-0.8X=60.2x=60.2x÷0.2=6÷0.2X=30(6)12x-8x=4.84x=4.84x÷4=4.8÷4X=1.2(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=68(9)x+5.6=9.4X+5.6-5.6=9.4-5.6X=3.8(10)x-0.7x=3.60.3x=3.60.3x÷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=0.2(14)3x－8＝163x-8+8=16+83x=243x÷3=24÷3X=8(15)3x+9=273x+9-9=27-93x=183x÷3=18÷33x=6(16)18(x-2)=27018x-36=27018x-36+36=270+3618x=30618x÷18=306÷18X=17(17)12x=300-4x12x+4x=300-4x+4x16x=30016x÷16=300÷16X=18.75(18)7x+5.3=7.47x+5.3-5.3=7.4-5.37x=2.17x÷7=2.1÷7X=0.3(19)3x÷5=4.83x÷5×5=4.8×53x=243x÷3=24÷3X=8(20)30÷x+25=85第5页共6页30÷x+25-25=85-2530÷x=6030÷x×x=60×x30=60x60x÷60=30÷60X=0.5(21)1.4×8-2x=611.2-2x+2x=6+2x11.2=6+2x2x+6-6=11.2-62x=5.22x÷2=5.2÷2X=2.6(22)6x-12.8×3=0.066x-38.4=0.066x=38.466x÷6=38.46÷6X=6.41(23)410-3x=170410-3x+3x=170+3x170+3x=4103x+170-170=410-1703x=2403x÷3=240÷3X=80(24)3(x+0.5)=213x+1.5=213x+1.5-1.5=21-1.53x=19.53x÷3=19.5÷3X=6.5(25)0.5x+8=430.5x+8-8=43-80.5x=350.5x÷0.5=35÷0.5X=70(26)6x-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=427x÷7=42÷7X=6(28)0.273÷x=0.35x=0.273÷0.35X=0.78(29)1.8x=0.9721.8x÷1.8=0.972÷1.8X=0.54(30)x÷0.756=90x÷0.756×0.756=90×0.756X=68.04(31)0.1(x+6)=3.3×0.40.1x+0.6=1.320.1x+0.6-0.6=1.32-0.60.1x=0.720.1x÷0.1=0.72÷0.1X=7.2(32)(27.5-3.5)÷x=424÷x=4x=24÷4X=6(33)9x-40=59x-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=2(36)10.5+x+21=56x+31.5-31.5=56-31.5x=24.5(37)x+2x+18=783x+18-18=78-18第6页共6页3x=603x÷3=60÷3X=20(38)(200-x)÷5=30(200-x)÷5×5=30×5200-x=150200-x+x=150+x150+x=200X+150-150=200-150X=50(39)(x-140)÷70=4(x-140)÷70×70=4×70X-140=280X-140+140=280+140X=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-x=3.89.8-x+x=3.8+x3.8+x=9.8X=9.8-3.8X=6（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+10-10=70-104x=604x÷4=60÷4X=15（48）3(x+3)=50-x+33x+9=53-x3x+x+9-9=53-x+x-94x=444x÷4=44÷4X=11（49）5x+15=605x+15-15=60-155x=455x÷5=45÷5X=9（50）3.5-5x=23.5-5x+5x=2+5x5x+2=3.55x+2-2=3.5-25x=1.55x÷5=1.5÷5X=0.3
