五年級解方程練習及答案

1、五年級解方程題有答案(12) X+8.3=10.7(11)91 +x=1.3(1) (0.5+x)+x=9.8 +2(13) 15x =3(2) 2(X+X+0.5)=9.8(14) 3x 8=16(3) 25000+x=6x(15) 3x+9=27(4) 3200=440+5X+X(16) 18(x-2)=270(5) X-0.8X=6(17) 12x=300-4x(6)12x-8x=4.8(18) 7x+5.3=7.4 7.5+2X=15(19) 3x +5=4.8(8)1.2x=81.6(25) 0.5x+8=43 x+5.6=9.4(26) 6x-3x=18(10)x-0.7x=3.6

2、(27) 7(6.5+x)=87.5(28) 0.273 +x=0.35(29) 1.8x=0.972(42) 5.6x=33.6(30) x + 0.756=90(31) 0.1(x+6)=3.3 X0.4(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(37) x+2x+18=78(38) (200-x)+ 5=30(39) (x-140) +70=4(40) 20-9x=2(43) 9.8-x=3.8(44) 75.6 +x=12.6(45) 5x+12.5=32.3(46) 5(

3、x+8)=102(47) x+3x+10=70(48) 3(x+3)=50-x+3(49) 5x+15=60(50) 3.5-5x=2(51) 0.3 X7+4x=12.5(52) x + 1.5-1.25=0.75(41) x+19.8=25.8(53) 4x-1.3 X 6=2.6(66) 13(x+5)=169(54 ) 6x+12.8=15.8(67) 2x-97=34.2(55) 150 X 2+3x=690(68) 3.4x-48=26.8(56 ) 2x-20=4(69) 42x+25x=134(57 ) 3x+6=18(70) 1.5(x+1.6)=3.6(58) 2(2.8+

4、x)=10.4(71) 2(x-3)=5.8(59 ) (x-3) +2=7.5(72) 65x+7=137(60 ) 13.2x+9x=33.3(73) 9x+4 X 2.5 =91(61) 3x=x+100(74) 4.2 x+2.5x=134(62) x+4.8=7.2(75) 10.5x+6.5x=51(63 ) 6x+18=48(76) 89x-43x=9.2(64 ) 3(x+2.1)=10.5(77) 5x-45=100(65 ) 12x-9x=8.7(78) 1.2x-0.5x=6.3(91) x +14x=75(79) 23.4=2x(80) 4x-x=48.6(81) 4.

5、5x-x=28(82)X-5.7=2.15(83) 5X-2X=18(84) 3X+0.7=7(85) 3.5 X2= 4.2+x(86) 26 X1.5= 2x+10(87) 0.5 義 1616X0.2=4x(88) 13 9.25 X=0.403(89) 18.9 +X=0. 3(90) 23x=14x +27(92) 95 5x=80(93) 1.8 +6x =54(94) 6.7x 60.3 =6.7(95) 9 +4x = 53(96) 2x+8=16(97) 20x-14x=24(98) x+7x=8(99) 9x-3x=6(100) 6x-8=4(101) 5x+x=9(102

6、) 8x-8=6x(115) 1.2x-8=4,4(103)4x=205(104) 2x-6=12(105)7x+7=14(106) 6x-6=0(107)5x+6=11(108)2x-8=10(109)2.5x-8=4(110) x- 3=7 4(111)3x+7=28(112) 3x-7=26(113) 9x-x=16(116) 3x-8=31(117) 6x+6=12(118) 3x-3=3(119) 5x-3x=4(120) 2x+16=19(121) 5x+8=19(122) 14-6x=8(123) 15+6x=27(124) 5-8x=4(125) 7x+8=15(126) 9-

7、2x=1(114) 24x+x=50(127) 4+5x=9(140) 6x-3=6(128) 10-x=8(141) 9x=18(129) 8x+9=17(142) 4x-18=14(130) 9+6x=15(143) 5x+9=11(131) x+9x=4+7(144) 17-2x=11(132) 2x+9=17(145) x+4+8=23(133) 8-4x=6(134) 6x-7=28(146) 7x-12=9(135) 7x-9=20(147) X-5.7=2.15(136) x-56=1(148) 5X-2X=18(137) 8-7x=1(149) 3X +0.5=5(138)x-

8、30=12(150) 3.5 X2= 4 x(139) 6x-21=21(151) 26 X1.5= 2x(152) 0.5 X1616X 0.1=4x(164) 18x 14x=12(153) 9.26 X=0.402(165) 3 x 42+14=15(175) 3x +5=4.8(166) 12 +4x=56(154) 36.9 +X=0.3(155) X +0.5=2.6(167) 22 - 14x=12(156) 93 5x=80(168) X+8.3=10.7(157) 180-6x =54(169) 5x =30(158) 9 +4x=40(170) x-5.6=9.4(159)

9、 0.2x 0.4 +0.5 =3.7(171) x +0.8=90(160) 9.4x 0.4x = 16.2(172) 3x 8=16(161) 92 4x = 20(173) 3x+9=27(162) 7x +6=1.4(174) 5.3+7x=7.4(163) 16x +34x=1(176) X-0.8X=6(181) x +5+9=21(177) 12x+8x=4.8(182)(300-x) +5=30(178) 7(x-2)=49(184) 41-3x=1725000+x-x=6x-x5x=250005x + 5=25000 + 5X=5000(4) 3200=440+5X+X6x

10、+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(183) 91 +x =1.3(179) 4 X 8+2x=36(180) (x-2)+3=7五年級解方程180題答案(1) (0.5+x)+x=9.8 + 20.5+2x=4.90.5+2x-0.5=4.9-0.52x=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

11、+x=6x(6)12x-8x=4.84x=4.84x + 4=4.8 + 4X=1.2(7) 7.5+2X=15 2x+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 +1.2 X=68(9) x+5.6=9.4 X+5.6-5.6=9.4-5.6X=3.8(10)x-0.7x=3.60.3x=3.60.3x +0.3=3.6 +0.3 X=12 (11)91 +x=1.391 +xx x=1.3 x x1.3x=911.3x + 1.3=91 +1.3 X=70(12) X+8.3=10.7 X+8.3

12、-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=306 18x+ 18=306 + 18X=17(17) 12x=300-4x 12x+4x=300-4x+4x16x=30016x +16=300 + 16X=18.75(18) 7x+5.3=7.4 7x+5.3-5.3=7.4-5.37x=2.1

13、 7x +7=2.1 +7X=0.3(19) 3x +5=4.8 3x -5X 5=4.8 X 53x=24 3x + 3=24 + 3 X=8(20) 30 + x+25=8530 +x+25-25=85-2530+ x=6030+xXx=60Xx30=60x 60x+ 60=30 + 60X=0.5(21) 1.4 X 8-2x=611.2-2x+2x=6+2x11.2=6+2x2x+6-6=11.2-62x=5.22x + 2=5.2 + 2 X=2.6(22) 6x-12.8 X 3=0.066x-38.4=0.066x=38.46 6x+6=38.46 +6X=6.41(23) 41

14、0-3x=170410-3x+3x=170+3x170+3x=4103x+170-170=410-1703x=240 3x+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=18 3x +3=18+3X=6(27) 7(6.5+x)=87.5 7x+45.5=87.57x+45.5-45.5=87.5-45.57x=427x+7=42+7X=6(28

15、) 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 X 0.756=90 X 0.756 X=68.04(31) 0.1(x+6)=3.3 X 0.40.1x+0.6=1.320.1x+0.6-0.6=1.32-0.60.1x=0.72 0.1x+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 + 9 X=5 (3

16、4) x + 5+9=21 x +5+9-9=21-9 x +5=12 x +5X5=12X5 X=60 (35) 48-27+5x=31 5x+21-21=31-21 5x=10 5x +5=10 + 5 X=2 (36) 10.5+x+21=56 x+31.5-31.5=56-31.5 x=24.5 (37) x+2x+18=78 3x+18-18=78-18 3x=603x +3=60+3 X=20 (38)(200-x)+ 5=30(200-x)+5X 5=30X5200-x=150 200-x+x=150+x 150+x=200X+150-150=200-150 X=50(39)(x

17、-140)+ 70=4(x-140)+70X 70=4X70X-140=280X-140+140=280+140 X=420 (40) 20-9x=2 9x=20-2 9x=18 9x +9=18+9 X=2 (41) x+19.8=25.8 X+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=12.6 X=75.6+12.6X=6(45) 5x+12.5=32.35x+12.5-12.5=32.3-12

18、.55x=19.85x +5=19.8+5 X=3.96 (46) 5(x+8)=1025x+40=1025x+40-40=102-405x=625x +5=62+5 X=12.4 (47) x+3x+10=704x+10=704x+10-10=70-104x=604x +4=60+4 X=15(48) 3(x+3)=50-x+3 3x+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-

19、2=3.5-25x=1.55x +5=1.5+ 5X=0.3(51) 0.3 X7+4x=12.5 4x+2.1=12.54x+2.1-2.1=12.5-2.14x=10.44x +4=10.4+4 X=2.6(52) x + 1.5-1.25=0.75x + 1.5-1.25+1.25=0.75+1.25x +1.5=2x - 1.5 X 1.5=2 X 1.5 X=3(53) 4x-1.3 X 6=2.64x-1.3 X 6+1.3 X 6=2.6+1.3 X 64x=10.44x +4=10.4 + 4 X=2.6(54) 6x+12.8=15.86x+12.8-12.8=15.8-12

20、.86x=36x+6=3+6X=0.5(55) 150 X 2+3x=6903x+300=6903x+300-300=690-3003x=3903x + 3=390+ 3 X=130(56) 2x-20=42x-20+20=4+202x=242x +2=24 + 2 X=12(57) 3x+6=183x+6-6=18-63x=123x +3=12 + 3 X=4(58) 2(2.8+x)=10.45.6+2x=10.42x+5.6-5.6=10.4-5.62x=4.82x + 2=4.8 + 2X=2.4(59) (x-3) +2=7.5 (x-3 ) +2X 2=7.5 X2X-3=15 X

21、=18(60) 13.2x+9x=33.322.2x=33.322.2x+22.2=33.3 +22.2X=1.5 (61) 3x=x+100 3x-x=x-x+1002x=1002x+2=100+2X=50(62) x+4.8=7.2X=7.2-4.8X=2.4(63) 6x+18=486x+18-18=48-186x=306x +6=30+6 x=5 (64) 3(x+2.1)=10.53x+6.3=10.53x=10.5-6.33x=4.23x + 3=4.2 + 3 X=1.4(65) 12x-9x=8.73x=8.73x +3=8.7 +3 X=2.9(66) 13(x+5)=169

22、13x+65=16913x+65-65=169-6513x=10413x+13=104 +13X=8(67) 2x-97=34.22x-97+97=34.2+972x=131.22x +2=131.2+2 X=65.6(68) 3.4x-48=26.83.4x-48+48=26.8+483.4x=74.83.4x+ 3.4=74.8 + 3.4X=22(69) 42x+25x=134 67x=13467x+67=134 + 67X=2(70) 1.5(x+1.6)=3.61.5x+2.4=3.61.5x=3.6-2.41.5x=1.21.5x+ 1.5=1.2 +1.5X=0.8(71) 2(

23、x-3)=5.82x-6=5.82x-6+6=5.8+62x=11.82x +2=11.8+2X=5.9(72) 65x+7=13765x+7-7=137-765x=13065x +65=130 + 65X=2(73) 9x+4 X 2.5 =91 9x+10=919x+10-10=91-109x=819x +9=81 + 9 X=9(74) 4.2 x+2.5x= 1346.7x=1346.7x+6.7=134+6.7X=20(75) 10.5x+6.5x=5117x=5117x+17=51 + 17X=3(76) 89x-43x=9.246x=9.246x+ 46=9.2 + 46X=0.

24、24x+ 4=4.8 +4(77) 5x-45=100 5x-45+45=100+455x=1455x +5=145+5X=29(78) 1.2x-0.5x=6.30.7x=6.30.7x+0.7=6.3 +0.7X=9(79) 23.4=2x 2x + 2=23.4 + 2X=11.7(80) 4x-x=48.63x=48.63x + 3=48.6 + 3X=16.2(81) 4.5x-x=283.5x=283.5x + 3.5=28 + 3.5X=8(82) X-5.7=2.15 X=5.7+2.15X=7.85(83) 5X-2X=183x=183x +3=18+3X=6(84) 3X+

25、0.7=73x+0.7-0.7=7-0.73x=6.33x +3=6.3 +3X=2.1(85) 3.5 X2= 4.2+x4.2+x=7X=7-4.2X=2.8(86) 26 X 1.5= 2x+102x+10=392x+10-10=39-102x=292x + 2=29 + 2X=14.5(87) 0.5 X 1616 X 0.2=4x4x=4.8X=1.2(88) 13 9.25- X=0.403X=139.25-0.403X=138.847(89) 18.9 +X=0. 3 X=18.9+0.3X=63(90) 23x=14x +2723x-14x=14x-14x+279x=279x

26、+9=27+9X=3(91) x +14x=75 15x=75 15x +15=75+15 X=5(92 ) 95-5x= 8095-5x+5x=80+5x5x+80=955x+80-80=95-805x=15X=3(93) 1.8 +6x =54 6x=54-1.8 6x=52.2 6x +6=52.2+6X=8.7(94) 6.7x -60.3 = 6.76.7x=60.3+6.76.7x=676.7x+ 6.7=67 + 6.7X=10(95) 9 +4x=53 4x=53-9 4x=444x + 4=44 + 4X=11(96)2x+8=162x=16-82x=82x +2=8+2X=

27、4(97) 20x-14x=246x=246x+ 6=24 + 62x-8+8=10+8X=42x=18(98) x+7x=8X=98x=8(109)2.5x-8=4X=12.5x-8+8=4+8(99) 9x-3x=62.5x=126x=62.5x2.5=12 +2.5X=1X=4.8(100) 6x-8=4(110)x-6x-8+8=4+83=746x=12X-X=2(101) 5x+x=96x=9(111)6x+ 6=9+6x=1.5(102)8x-8=6x8x-8+8=6x+88x-6x=6x-6x+82x=82x+ 2=8+2X=4(103)4x=2054x，=20，X=25(104

28、) 2x-6=122x-6+6=12+62x=182x+ 2=18+2X=9(105)7x+7=147x+7-7=14-77x=77x+ 7=7+7X=1(106) 6x-6=06x-6+6=0+66x=6X=1(107)5x+6=115x+6-6=11-65x=5X=13 + 3=7+3X=7.753x+7=283x+7-7=28-73x=213xX=7(112)3x-7=263x-7+7=26+73x=333xX=11(113) 9x-x=168x=16+ 3=33+38x +8=16 + 8X=2(114) 24x+x=5025x=5025x + 25=50+25X=2(115) 1.2

29、x-8=41.2x-8+8=4+81.2x=121.2x +1.2=12+1.2X=10(116) 3x-8=313x-8+8=31+83x=393x + 3=39 + 3X=13(117) 6x+6=126x+6-6=12-66x=6X=1(108)2x-8=10(118) 3x-3=33x-3+3=3+33x=63x +3=6+3X=2(119) 5x-3x=42x=42x +2=4+2X=2(120) 2x+16=192x+16-16=19-162x=32x +2=3+2X=1.5(121) 5x+8=195x+8-8=19-85x=115x +5=11 + 5X=2.2(122) 14

30、-6x=8 14-6x+6x=8+6x6x+8-8=14-86x=6X=1(123) 15+6x=276x+15-15=27-156x=126x +6=12+6X=2(124) 5-8x=4 5-8x+8x=4+8x8x+4-4=5-48x=18x +8=1 + 8X=0.125(125) 7x+8=157x+8-8=15-87x=7X=1(126) 9-2x=1 9-2x+2x=1+2x2x+1-1=9-12x=82x +2=8+2X=4(127) 4+5x=95x+4-4=9-45x=5X=1(128) 10-x=8X=10-8X=2(129) 8x+9=178x+9-9=17-98x=8

31、X=1(130) 9+6x=156x+9-9=15-96x=6X=1(131) x+9x=4+710x=1110x +10=11 + 10X=1.1(132) 2x+9=172x+9-9=17-92x=82x +2=8+2X=4(133) 8-4x=6 8-4x+4x=6+4x4x+6-6=8-64x=24x +2=2 + 4X=0.5(134) 6x-7=286x-7+7=28+76x=366x + 6=36 + 6X=6(135) 7x-9=207x-9+9=8+207x=287x + 7=28 + 7X=4(136) x-56=1 X=56+1X=57(137) 8-7x=18-7x+7

32、x=1+7x7x+1-1=8-17x=7X=1(138) x-30=12 X-30+30=12+30X=42(139) 6x-21=216x-21+21=21+216x=426x + 6=42 + 6X=7(140) 6x-3=66x-3+3=6+36x=96x +6=9+6X=1.5(141) 9x=189x +9=18+9X=2(142) 4x-18=144x-18+18=14+184x=324x + 4=32 + 4X=8(143) 5x+9=115x+9-9=11-95x=25x +5=2+5X=0.4(144) 17-2x=11 17-2x+2x=11+2x2x+11-11=17-1

33、12x=62x +2=6+2 X=3(145) x+4+8=23X+12=23X=23-12X=11(146) 7x-12=97x-12+12=9+127x=217x +7=21+7X=3(147) X-5.7=2.15 x=5.7+2.15 X=7.85(148) 5X-2X=18 3x=183x +3=18 + 3 X=6(149) 3X +0.5=5 3x+0.5-0.5=5-0.53x=4.53x + 3=4.5 + 3 X=1.5(150) 3.5 X2= 4 x 4x=74x +4=7+4 X=1.75(151) 26 X 1.5= 2x 2x=392x+2=39+2X=18(15

34、2) 0.5 X 16 16X 0.1=4x 4x=6.44x+4=6.4 +4X=1.6(153) 9.26- X=0.402X=9.26-0.402 X=8.858(154) 36.9 +X=0.3 X=36.9+0.3X=123(155) X +0.5=2.6 X=0.5 X 2.6 X=1.3(156) 93 -5x=80 93-5X+5X=80+5X 5X+80-80=93-805X=135X +5=13 + 5 X=2.6(157) 180-6x =54 180-6X+6X=54+6X 6X+54-54=180-546X=1266X +6=126 + 6 X=21X=11(158) 9 +4x=404X+9-9=40-94X=314X +4=31+4X=7.75(159) 0.2x -0.4 +0.5 =3.70.2X-0.5+0.5-0.4+0.4=3.7-0.5+0.40.2X=3.60.2X+ 0.2=3.6 + 0.2X=18(160) 9.4x -0.4x = 16