关于五年级解方程练习题50题及答案ok.pdf

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1、五年级解方程五年级解方程5050题有答案题有答案（1 1）(0.5+x)+x=9.8(0.5+x)+x=9.82 2（2 2）2(X+X+0.5)=9.82(X+X+0.5)=9.8（3 3）25000+x=6x25000+x=6x（4 4）3200=440+5X+X3200=440+5X+X（5 5）X-0.8X=6X-0.8X=6(6)12x-8x=4.8(6)12x-8x=4.8(7)7.5+2X=15(7)7.5+2X=15(8)1.2x=81.6(8)1.2x=81.6（7 7）x+5.6=9.4x+5.6=9.4(10)x-0.7x=3.6(10)x-0.7x=3.6(11)91(

2、11)91x x1.31.3（1212）X+8.3=10.7 X+8.3=10.7(13)15x(13)15x3 3(14)3x(14)3x8 81616(15)3x+9=27(15)3x+9=27(16)18(x-2)=270(16)18(x-2)=270(17)12x=300-4x(17)12x=300-4x(18)7x+5.3=7.4(18)7x+5.3=7.4(19)3x(19)3x5=4.85=4.8(25)0.5x+8=43(25)0.5x+8=43(26)6x-3x=18(26)6x-3x=18(27)(27)7(6.5+x)=87.5 7(6.5+x)=87.5（2828）0.

3、273 0.273x=0.35x=0.35(29)1.8x=0.972(29)1.8x=0.972(30)x(30)x0.756=900.756=90(31)0.1(x+6)=3.3(31)0.1(x+6)=3.30.40.4(32)(27.5-3.5)(32)(27.5-3.5)x=4x=4(33)9x-40=5(33)9x-40=5(34)x(34)x5+9=215+9=21(35)(35)48-27+5x=31 48-27+5x=31(36)10.5+x+21=56(36)10.5+x+21=56（3737）x+2x+18=78 x+2x+18=78(38)(200-x)(38)(200

4、-x)5=305=30(39)(39)(x-140)(x-140)70=470=4（4040）20-9x=2 20-9x=2(41)x+19.8=25.8(41)x+19.8=25.8(42(42）5.6x=33.6 5.6x=33.6（4343）9.8-x=3.8 9.8-x=3.8（4444）75.6 75.6x=12.6x=12.6（4545）5x+12.5=32.3 5x+12.5=32.3（4646）5(x+8)=102 5(x+8)=102（4747）x+3x+10=70 x+3x+10=70（1 1）(0.5+x)+x=9.8(0.5+x)+x=9.82 2 0.5+2x=4.9

5、 0.5+2x=4.9 0.5+2x-0.5=4.9-0.5 0.5+2x-0.5=4.9-0.5 2x=4.4 2x=4.4 2x 2x2=4.42=4.42 2 X=2.2 X=2.2（2 2）2(X+X+0.5)=9.82(X+X+0.5)=9.8 2x+2x+1=9.8 2x+2x+1=9.8 4x+1-1=9.8-1 4x+1-1=9.8-1 4x=8.8 4x=8.8 4x 4x4=8.84=8.84 4 X=2.2 X=2.2（3 3）25000+x=6x25000+x=6x 25000+x-x=6x-x 25000+x-x=6x-x 5x=25000 5x=25000 5x 5

6、x5=250005=250005 5 X=5000 X=5000（4848）3(x+3)=50-x+3 3(x+3)=50-x+3（4949）5x+15=60 5x+15=60（5050）3.5-5x=2 3.5-5x=2五年级解方程五年级解方程5050题答案题答案（4 4）3200=440+5X+X3200=440+5X+X 6x+440=3200 6x+440=32006x+450-450=3200-4406x+450-450=3200-440 6x=2760 6x=2760 6x 6x6=27606=27606 6X=460X=460（5 5）X-0.8X=6X-0.8X=6 0.2x=

7、6 0.2x=6 0.2x 0.2x0.2=60.2=60.20.2X=30X=30(6)12x-8x=4.8(6)12x-8x=4.8 4x=4.8 4x=4.8 4x 4x4=4.84=4.84 4 X=1.2 X=1.2(7)7.5+2X=15(7)7.5+2X=152x+7.5-7.5=15-7.52x+7.5-7.5=15-7.5 2x=7.5 2x=7.5 2x 2x2=7.52=7.52 2 X=3.75 X=3.75(8)1.2x=81.6(8)1.2x=81.61.2x1.2x1.2=81.61.2=81.61.21.2X=68X=68(9)x+5.6=9.4(9)x+5.6

8、=9.4X+5.6-5.6=9.4-5.6X+5.6-5.6=9.4-5.6X=3.8X=3.8(10)x-0.7x=3.6(10)x-0.7x=3.6 0.3x=3.6 0.3x=3.6 0.3x 0.3x0.3=3.60.3=3.60.30.3X=12X=12(11)91(11)91x x1.31.3 91 91x xx=1.3x=1.3x x 1.3x=91 1.3x=911.3x1.3x1.3=911.3=911.31.3 X=70 X=70(12)X+8.3=10.7(12)X+8.3=10.7 X+8.3-8.3=10.7-8.3 X+8.3-8.3=10.7-8.3 X=2.4

9、X=2.4(13)15x(13)15x3 3 15x 15x15=315=31515 X=0.2 X=0.2(14)3x(14)3x8 81616 3x-8+8=16+8 3x-8+8=16+8 3x=24 3x=24 3x 3x3=243=243 3 X=8 X=8(15)3x+9=27(15)3x+9=27 3x+9-9=27-9 3x+9-9=27-9 3x=18 3x=18 3x 3x3=183=183 3 3x=6 3x=6(16)18(x-2)=270(16)18(x-2)=270 18x-36=270 18x-36=270 18x-36+36=270+36 18x-36+36=2

10、70+36 18x=306 18x=306 18x 18x18=30618=3061818 X=17 X=17(17)12x=300-4x(17)12x=300-4x 12x+4x=300-4x+4x 12x+4x=300-4x+4x 16x=300 16x=300 16x 16x16=30016=3001616 X=18.75 X=18.75(18)7x+5.3=7.4(18)7x+5.3=7.4 7x+5.3-5.3=7.4-5.3 7x+5.3-5.3=7.4-5.3 7x=2.1 7x=2.1 7x 7x7=2.17=2.17 7 X=0.3 X=0.3(19)3x(19)3x5=4.

11、85=4.8 3x 3x5 55=4.85=4.85 5 3x=24 3x=24 3x 3x3=243=243 3 X=8 X=8(20)30(20)30 x+25=85x+25=85 30 30 x+25-25=85-25x+25-25=85-25 30 30 x=60 x=60 30 30 x xx=60 x=60 x x 30=60 x 30=60 x 60 x 60 x60=3060=306060 X=0.5 X=0.5(21)1.4(21)1.48-2x=68-2x=6 11.2-2x+2x=6+2x 11.2-2x+2x=6+2x 11.2=6+2x 11.2=6+2x 2x+6-

12、6=11.2-6 2x+6-6=11.2-6 2x=5.2 2x=5.2 2x 2x2=5.22=5.22 2 X=2.6 X=2.6(22)6x-12.8(22)6x-12.83=0.063=0.06 6x-38.4=0.06 6x-38.4=0.06 6x=38.46 6x=38.46 6x 6x6=38.466=38.466 6 X=6.41 X=6.41(23)410-3x=170(23)410-3x=170 410-3x+3x=170+3x 410-3x+3x=170+3x 170+3x=410 170+3x=410 3x+170-170=410-170 3x+170-170=410

13、-170 3x=240 3x=240 3x 3x3=2403=2403 3 X=80 X=80 (24)3(x+0.5)=21 (24)3(x+0.5)=21 3x+1.5=21 3x+1.5=21 3x+1.5-1.5=21-1.5 3x+1.5-1.5=21-1.5 3x=19.5 3x=19.5 3x 3x3=19.53=19.53 3 X=6.5 X=6.5(25)0.5x+8=43(25)0.5x+8=43 0.5x+8-8=43-8 0.5x+8-8=43-8 0.5x=35 0.5x=35 0.5x 0.5x0.5=350.5=350.50.5 X=70 X=70(26)6x-3

14、x=18(26)6x-3x=18 3x=18 3x=18 3x 3x3=183=183 3 X=6 X=6(27)7(6.5+x)=87.5(27)7(6.5+x)=87.5 7x+45.5=87.5 7x+45.5=87.5 7x+45.5-45.5=87.5-45.5 7x+45.5-45.5=87.5-45.5 7x=42 7x=42 7x 7x7=427=427 7 X=6 X=6(28)0.273(28)0.273x=0.35x=0.35 x=0.273 x=0.2730.350.35 X=0.78 X=0.78(29)1.8x=0.972(29)1.8x=0.972 1.8x 1.

15、8x1.8=0.9721.8=0.9721.81.8 X=0.54 X=0.54(30)x(30)x0.756=900.756=90 x x0.7560.7560.756=900.756=900.7560.756 X=68.04 X=68.04(31)0.1(x+6)=3.3(31)0.1(x+6)=3.30.40.4 0.1x+0.6=1.32 0.1x+0.6=1.32 0.1x+0.6-0.6=1.32-0.6 0.1x+0.6-0.6=1.32-0.6 0.1x=0.72 0.1x=0.72 0.1x 0.1x0.1=0.720.1=0.720.10.1 X=7.2 X=7.2(32)

16、(27.5-3.5)(32)(27.5-3.5)x=4x=4 24 24x=4x=4 x=24 x=244 4 X=6 X=6(33)9x-40=5(33)9x-40=5 9x-40+40=5+40 9x-40+40=5+40 9x=45 9x=45 9x 9x9=459=459 9 X=5 X=5(34)x(34)x5+9=215+9=21 x x5+9-9=21-95+9-9=21-9 x x5=125=12 x x5 55=125=125 5 X=60 X=60(35)48-27+5x=31(35)48-27+5x=31 5x+21-21=31-21 5x+21-21=31-21 5x=

17、10 5x=10 5x 5x5=105=105 5 X=2 X=2(36)10.5+x+21=56(36)10.5+x+21=56 x+31.5-31.5=56-31.5 x+31.5-31.5=56-31.5 x=24.5 x=24.5(37)x+2x+18=78(37)x+2x+18=78 3x+18-18=78-18 3x+18-18=78-18 3x=60 3x=60 3x 3x3=603=603 3 X=20 X=20(38)(200-x)(38)(200-x)5=305=30 (200-x)(200-x)5 55=305=305 5 200-x=150 200-x=150 200-

18、x+x=150+x 200-x+x=150+x 150+x=200 150+x=200 X+150-150=200-150 X+150-150=200-150 X=50 X=50(39)(x-140)(39)(x-140)70=470=4 (x-140)(x-140)707070=470=47070 X-140=280 X-140=280 X-140+140=280+140 X-140+140=280+140 X=420 X=420（4040）20-9x=2 20-9x=2 9x=20-2 9x=20-2 9x=18 9x=18 9x 9x9=189=189 9 X=2 X=2(41)x+19

19、.8=25.8(41)x+19.8=25.8 X+19.8-19.8=25.8-19.8 X+19.8-19.8=25.8-19.8 X=6 X=6(42(42）5.6x=33.6 5.6x=33.6 5.6x 5.6x5.6=33.65.6=33.65.65.6 X=6 X=6（4343）9.8-x=3.8 9.8-x=3.8 9.8-x+x=3.8+x 9.8-x+x=3.8+x 3.8+x=9.8 3.8+x=9.8 X=9.8-3.8 X=9.8-3.8 X=6 X=6（4444）75.6 75.6x=12.6x=12.6 X=75.6 X=75.612.612.6 X=6 X=6（4

20、545）5x+12.5=32.3 5x+12.5=32.3 5x+12.5-12.5=32.3-12.5 5x+12.5-12.5=32.3-12.5 5x=19.8 5x=19.8 5x 5x5=19.85=19.85 5 X=3.96 X=3.96（4646）5(x+8)=102 5(x+8)=102 5x+40=102 5x+40=102 5x+40-40=102-40 5x+40-40=102-40 5x=62 5x=62 5x 5x5=625=625 5 X=12.4 X=12.4（4747）x+3x+10=70 x+3x+10=70 4x+10=70 4x+10=70 4x+10-

21、10=70-10 4x+10-10=70-10 4x=60 4x=60 4x 4x4=604=604 4 X=15 X=15（4848）3(x+3)=50-x+3 3(x+3)=50-x+3 3x+9=53-x 3x+9=53-x 3x+x+9-9=53-x+x-9 3x+x+9-9=53-x+x-9 4x=44 4x=44 4x 4x4=444=444 4 X=11 X=11（4949）5x+15=60 5x+15=60 5x+15-15=60-15 5x+15-15=60-15 5x=45 5x=45 5x 5x5=455=455 5 X=9 X=9（5050）3.5-5x=2 3.5-5x=2 3.5-5x+5x=2+5x 3.5-5x+5x=2+5x 5x+2=3.5 5x+2=3.5 5x+2-2=3.5-2 5x+2-2=3.5-2 5x=1.5 5x=1.5 5x 5x5=1.55=1.55 5 X=0.3 X=0.3