五年級解方程練習(xí)和答案

1、五年級解方程練習(xí)和答案(12)X+8.3=10.7(2) 2(X+X+0.5)=9.8(3) 25000+x=6x(1) (0.5+x)+x=9.8 - 2(13)15x = 3(14) 3x - 8= 16(15) 3x+9=27(4) 3200=440+5X+X(16)18(x-2)=270(5) X-0.8X=6(17)12x=300-4x 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(7) x+5.6=9.4(26)6x-3x=18(10)x-0.7x=3.6(27)7(6.5+x)

2、=87.5(11)91 - x= 2.31 / 21(28)0.273 - x=0.35(40)20-9x=2(29)1.8x=0.972(41)x+19.8=25.8(30)x - 0.756=90(42)5.6x=33.6(31)0.1(x+6)=3.3 X 0.4(43)9.8-x=3.8(32)(27.5-3.5) - x=4(44)75.6 - x=12.6(33)9x-40=5(45)5x+12.5=32.3(34)x寧5+9=21(46)5(x+8)=102(35)48-27+5x=31(47)x+3x+10=70(36)10.5+x+21=56(48)3(x+3)=50-x+3

3、(37)x+2x+18=78(49)5x+15=60(38)(200-x) - 5=30(50)3.5-5x=2(39)(x-140) - 70=4(51)0.3 X 7+4x=12.5(52) x 十 1.5-1.25=0.75(64) 3(x+2.1)=10.5(53)4x-1.3 X 6=2.6(65) 12x-9x=8.7(54)6x+12.8=15.8(66) 13(x+5)=169(55)150 X2+3x=690(67)2x-97=34.2(56)2x-20=4(68) 3.4x-48=26.8(57)3x+6=18(69) 42x+25x=134(58)2(2.8+x)=10.

4、4(70) 1.5(x+1.6)=3.6(59)(x-3) - 2=7.5(71) 2(x-3)=5.8(60)13.2x+9x=33.3(72) 65x+7=137(61)3x=x+100(73) 9x+4 X 2.5 = 91(62)x+4.8=7.2(74) 4.2 x+2.5x = 134(63)6x+18=48(75) 10.5x+6.5x=51(76) 89x-43x=9.2(88) 13 9.25 X=0.403(77) 5x-45=100(89) 18.9 - X=0. 3(78) 1.2x-0.5x=6.3(90) 23x=14x + 27(79) 23.4=2x(91) x

5、 + 14x=75(80) 4x-x=48.6(92 ) 95 5x= 80(81) 4.5x-x=28(93) 1.8 +6x = 54(82)X-5.7=2.15(94) 6.7x 60.3 = 6.7(83) 5X-2X=18(95) 9 + 4x= 53(84) 3X+0.7=7(96) 2x+8=16(85) 3.5 X 2= 4.2+x(97) 20x-14x=24(86) 26 X 1.5= 2x+10(98)x+7x=8(87) 0.5 X 16 16 X 0.2=4x11 / 21(99)9x-3x=63(110) x-3 =74(100)6x-8=4(111)3x+7=28

6、(101 )5x+x=9(112) 3x-7=26(102)8x-8=6x(113) 9x-x=16(103)44x=205(114) 24x+x=50(104)2x-6=12(115) 1.2x-8=4(105 )7x+7=14(116) 3x-8=31(106)6x-6=0(117) 6x+6=12(107)5x+6=11(118) 3x-3=3(108)2x-8=10(119) 5x-3x=4(109)2.5x-8=4(120) 2x+16=19(121) 5x+8=19(122) 14-6x=8(134) 6x-7=28(123) 15+6x=27(135) 7x-9=20(124)

7、5-8x=4(136) x-56=1(125) 7x+8=15(137) 8-7x=1(126)9-2x=1(138)x-30=12(127) 4+5x=9(139) 6x-2 仁21(128) 10-x=8(140) 6x-3=6(129) 8x+9=17(141) 9x=18(130) 9+6x=15(142) 4x-18=14(131)x+9x=4+7(143) 5x+9=11(132) 2x+9=17(144)17-2x=11(133)8-4x=6(145)x+4+8=23(146)7x-12=9(147)X-5.7=2.15(157) 180-6x = 54(158) 9 + 4x

8、= 40(159) 0.2x 0.4 + 0.5= 3.7(148)5X-2X=18(160) 9.4x 0.4x = 16.2(149) 3X +0.5=5(161) 92 4x = 20(150) 3.5 X 2= 4 x(162) 7x - 6=1.4(151) 26 X 1.5= 2x(163) 16x + 34x=1(152) 0.5 X 1616 X 0.1=4x(164) 18x 14x=12(153)9.26 X=0.402(165) 3 x 42 - 14=15(154) 36.9 - X=0.3(166) 12 + 4x=56(155) X - 0.5=2.6(156) 9

9、3 5x = 80(167) 22 14x=12(168) X+8.3=10.7(177) 12x+8x=4.8(169) 5x = 30(178) 7(x-2)=49(170) x-5.6=9.4(179) 4 X 8+2x=36(171) x - 0.8=90(180) (x-2) - 3=7(172) 3x - 8 = 16(181) x - 5+9=21(173) 3x+9=27(182)(300-x) - 5=30(174) 5.3+7x=7.4(183) 91 - x = 1.3(175) 3x - 5=4.8(184)41-3x=17(176) X-0.8X=6五年級解方程練習(xí)和

10、答案五年級解方程練習(xí)和答案0.5+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+ 仁 9.84x+1-1=9.8-14x=8.84x 十 4=8.8 十 4X=2.2(3) 25000+x=6x25000+x-x=6x-x5x=250005x - 5=25000 - 5X=5000(4) 3200=440+5X+X 6x+440=32006x+450-450=3200-4406x=27606x 6=2760 6X=460(5) X-0.8X=60.2x=60.2x - 0.2=6 - 0.2X=

11、30(6) 12x-8x=4.84x=4.84x 十 4=4.8 十 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=3.810 / 21(10) x-0.7x=3.60.3x=3.60.3x 0.3=3.6 0.3X=12(11) 91 - x= 1.391 - xx x=1.3 x x 1.3x=911.3x - 1.3=91 - 1.3X=70(12) X+8.3=10.7X

12、+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.

13、3=7.4-5.37x=2.17x - 7=2.1 - 7X=0.3(19) 3x - 5=4.83x - 5 x 5=4.8 x 53x=243x - 3=24 - 3X=8(20) 30 - x+25=8530 - x+25-25=85-2530 - x=6030 - xX x=60 X x30=60x60x - 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 十 2=5.2 十 2X=2.6(22) 6x-12.8 X 3=0.066x-38.4=0.066x=38.466x -

14、6=38.46 十 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-

15、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 X 0.756=90 X 0.756X=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=0.720.1x - 0.1=0.72 - 0.1X=7.2(32) (27.5-3.5) - x=424 - x=4x=24 - 4X=6(33) 9x-40=

16、59x-40+40=5+409x=459x 十 9=45 十 9X=5(34) x - 5+9=21x- 5+9-9=21-9x-5=12x 5 X 5=12 X 5X=60(35) 48-27+5x=315x+21-2 仁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=78-183x=603x 3=60 3X=20(38) (200-x) - 5=30 (200-x) - 5 X 5=30 X 5200-x=150 200-x+x=150+x 150+x=200 X

17、+150-150=200-150 X=50(39) (x-140) - 70=4(x-140) - 70 X 70=4 X 70X-140=280X-140+140=280+140X=420(40) 20-9x=29x=20-29x=189x 十 9=18 十 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

18、.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 十 4=60 十 4X=15(48) 3(x+3)=50-x+33x+9=53-x3x+x+9-9=53-x+x-94x=444x 十 4=44 十 4X=11(49) 5x+15=605x+15-15=60-155x=455x 十 5=45 5X=9(50 )3.5-5x=2

19、3.5-5x+5x=2+5x5x+2=3.55x+2-2=3.5-25x=1.55x 十 5=1.5 十 5X=0.3(51 )0.3 X 7+4x=12.54x+2.1=12.54x+2.1-2.1=12.5-2.14x=10.44x 十 4=10.4 十 4X=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 1.5X=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 十 4=10.4 十 4X=2.6(54) 6x+12

20、.8=15.86x+12.8-12.8=15.8-12.86x=36x 6=3 6X=0.5(55 )150 X 2+3x=6903x+300=6903x+300-300=690-3003x=3903x - 3=390 - 3X=130(56) 2x-20=42x-20+20=4+202x=242x 十 2=24 十 2X=12(57) 3x+6=183x+6-6=18-63x=123x - 3=12 - 3X=4(58) 2(2.8+x)=10.45.6+2x=10.42x+5.6-5.6=10.4-5.62x=4.82x 十 2=4.8 十 2X=2.4(59) (x-3) - 2=7.5

21、(x-3) - 2 X 2=7.5 X 2X-3=15X=18(60) 13.2x+9x=33.322.2x=33.322.2x - 22.2=33.3 - 22.2X=1.5(61) 3x=x+1003x-x=x-x+100 2x=1002x 十 2=100 十 2X=50(62) x+4.8=7.2X=7.2-4.8 X=2.4(63) 6x+18=486x+18-18=48-186x=306x 6=30 6 x=5(64 ) 3(x+2.1)=10.5 3x+6.3=10.5 3x=10.5-6.3 3x=4.23x - 3=4.2 - 3X=1.4(65) 12x-9x=8.73x=8

22、.73x 3=8.7 3X=2.9(66) 13(x+5)=16913x+65=169 13x+65-65=169-6513x=10413x - 13=104 - 13 X=8(67) 2x-97=34.2 2x-97+97=34.2+972x=131.22x 十 2=131.2 十 2X=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=13467x=13467x - 67=134 - 67X=219 / 21(70) 1.5(x+1.6)=3.61.5x+2.4=3.6

23、1.5x=3.6-2.41.5x=1.21.5x - 1.5=1.2 - 1.5X=0.8(71 ) 2(x-3)=5.82x-6=5.82x-6+6=5.8+62x=11.82x 十 2=11.8 十 2X=5.9(72) 65x+7=13765x+7-7=137-765x=13065x - 65=130 - 65X=2(73) 9x+4 X 2.5 = 919x+10=919x+10-10=91-109x=819x 十 9=81 十 9X=9(74) 4.2 x+2.5x = 1346.7x=1346.7x - 6.7=134 - 6.7X=20(75) 10.5x+6.5x=5117x=

24、5117x - 17=51 - 17X=3(76) 89x-43x=9.246x=9.246x - 46=9.2 - 46X=0.2(77) 5x-45=1005x-45+45=100+455x=1455x 十 5=145 十 5X=29(78) 1.2x-0.5x=6.318 / 210.7x=6.30.7x - 0.7=6.3 - 0.7X=9(79) 23.4=2x2x 十 2=23.4 十 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=2.15X=5.7+2.15X=7.85(83 ) 5X-2X=183x=183x - 3=18 - 3X=6(84 ) 3X+0.7=73x+0.7-0.7=7-0.