五年级解方程练习及答案.docx

1、五年级解方程练习及答案五年级解方程题有答案(12)X+8.3=10.7(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) 7.5+2X=15(19)3x 廿=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

2、.5+x)=87.5(11)91 -x= 1.3(28)0.273 *0.35(40)20-9x=2(29)1.8x=0.972(41)x+19.8=25.8(30)x P.756=90(42)5.6x=33.6(31)0.1(x+6)=3.3 X0.4(43)9.8-x=3.8(32)(27.5-3.5) -nx=4(44)75.6 -(=12.6(33)9x-40=5(45)5x+12.5=32.3(34)x -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(37)x+2x

3、+18=78(49)5x+15=60(38)(200-x)廿=30(50)3.5-5x=2(39)(x-140) -70=4(51)0.3 X7+4x=12.5(52) x-1.5-1.25=0.75(64) 3(x+2.1)=10.5(53) 4x-1.3 X6=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(70) 1.5

4、(x+1.6)=3.6(59) (x-3)十2=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 X2.5= 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 *0. 3(78) 1.2x-0.5x=6.3(90) 23x=14x +27(79) 23.4=2x(91) x + 14x=75(80

5、) 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 X2= 4.2+x(97) 20x-14x=24(86) 26 X1.5= 2x+10(98) x+7x=8(87) 0.5 X16 16 X0.2=4x(99) 9x-3x=6(111)3x+7=28(100)6x-8=4(112) 3x-7=26(101)5x+x=9(113) 9x-x

6、=16(102)8x-8=6x(114) 24x+x=50(103)44x=205(115) 1.2x-8=4(104)2x-6=12(116) 3x-8=31(105)7x+7=14(117) 6x+6=12(106)6x-6=0(118) 3x-3=3(107)5x+6=11(119) 5x-3x=4(108)2x-8=10(120) 2x+16=19(109)2.5x-8=4(121) 5x+8=19(110)37x- 一 =74(122) 14-6x=8(123) 15+6x=27(135) 7x-9=20(124) 5-8x=4(136) x-56=1(125) 7x+8=15(13

7、7) 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(134) 6x-7=28(146) 7x-12=9(158) 9 + 4x = 40(147) X-5.7=2.15(159) 0.2x 0.4 + 0.5 = 3.7(

8、148) 5X-2X=18(160) 9.4x 0.4x = 16.2(149) 3X +0.5=5(161) 92 4x = 20(150) 3.5 X2= 4 x(162) 7x +6=1.4(151) 26 X1.5= 2x(163) 16x + 34x=1(152) 0.5 X16 16 X0.仁4x(164) 18x 14x=12(153) 9.26 X=0.402(165) 3 x 42 +14=15(154) 36.9 空=0.3(166) 12 + 4x=56(155) X -X).5=2.6(156) 93 5x = 80(167) 22 14x=12(157) 180-6x

9、 = 54(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 X8+2x=36(171) x +0.8=90(180) (x-2) +3=7(172) 3x - 8 = 16(181) x 廿+9=21(173) 3x+9=27(182)(300-x)廿=30(174) 5.3+7x=7.4(183) 91 -x = 1.3(175) 3x +5=4.8(176) X-0.8X=6(184) 41-3x=17五年级解方程180题答案(1)(0.5+x)+x=9.8 -20.5+2x

10、=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 -4=8.8 4X=2.2(3)25000+x=6x25000+x-x=6x-x5x=250005x 廿=25000 -5X=5000(4)3200=440+5X+X6x+440=32006x+450-450=3200-4406x=27606x -5=2760 -5X=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 -

11、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=68X+5.6-5.6=9.4-5.6X=3.8(10)x-0.7x=3.60.3x=3.60.3x *0.3=3.6 -).3X=12(11)91 -x= 1.391 -xXx=1.3 Xx1.3x=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

12、+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(9)x+5.6=9.4(18)7x+5.3=7.40.5x=357x+5.3-5.3=7.4-5.30.5x *0.5=35 -0.57x=2.1X=707x -7=2.1 -7(26)6x-3x=18X=0.

13、33x=18(19)3x 廿=4.83x -3=18 -33x 廿 X5=4.8 X5X=63x=24(27)7(6.5+x)=87.53x -3=24 -37x+45.5=87.5X=87x+45.5-45.5=87.5-45.5(20)30 +25=857x=4230 +x+25-25=85-257x -7=42 30 -c=60X=630 -xXx=60 Xx30=60x(28)0.273 -x=0.3560x 北0=30 北0x=0.273 -0.35X=0.5X=0.78(21)1.4 X8-2x=611.2-2x+2x=6+2x(29)1.8x=0.97211.2=6+2x1.8x

14、 -1.8=0.972 -1.82x+6-6=11.2-6X=0.542x=5.22x +2=5.2 2(30)x -0.756=90X=2.6x -0.756 X0.756=90 X0.756(22)6x-12.8 X3=0.06X=68.046x-38.4=0.06(31)0.1(x+6)=3.3 X0.46x=38.460.1x+0.6=1.326x 北=38.46 北0.1x+0.6-0.6=1.32-0.6X=6.410.1x=0.72(23)410-3x=1700.1x -0.1=0.72 -0.1410-3x+3x=170+3xX=7.2170+3x=410(32)(27.5-3

15、.5) -x=43x+170-170=410-17024 -x=43x=240x=24 -43x -3=240 -3X=6X=80(33)9x-40=5(24) 3(x+0.5)=219x-40+40=5+403x+1.5=219x=453x+1.5-1.5=21-1.59x -9=45 +93x=19.5X=53x -3=19.5 -3(34)x-5+9=21X=6.5x-5+9-9=21-9(25)0.5x+8=43x-5=120.5x+8-8=43-8x +5X5=12 X5X=60X=6(35)48-27+5x=31(44) 75.6 -x=12.65x+21-2 仁31-21X=75

16、.6 -12.65x=105x -5=10 廿X=6X=2(45) 5x+12.5=32.3(36)10.5+x+21=565x+12.5-12.5=32.3-12.5x+31.5-31.5=56-31.55x=19.8x=24.55x 廿=19.8 -5(37)x+2x+18=78X=3.963x+18-18=78-18(46) 5(x+8)=1023x=605x+40=1023x -3=60 35x+40-40=102-40X=205x=62(38)(200-x) -5=305x -h5=62 廿(200-x) -5 X5=30 X5X=12.4200-x=150(47) x+3x+10=

17、70200-x+x=150+x4x+10=70150+x=2004x+10-10=70-10X+150-150=200-1504x=60X=504x 4=60 4X=15(39)(x-140) -70=4(48) 3(x+3)=50-x+3(x-140) -70 X70=4 X703x+9=53-xX-140=2803x+x+9-9=53-x+x-9X-140+140=280+1404x=44X=4204x 4=44 4(40) 20-9x=29x=20-2X=119x=18(49) 5x+15=609x +9=18 +95x+15-15=60-15X=25x=45(41)x+19.8=25.

18、85x +5=45 5X+19.8-19.8=25.8-19.8X=9X=6(50) 3.5-5x=23.5-5x+5x=2+5x(42 )5.6x=33.65x+2=3.55.6x 弋.6=33.6 *5.65x+2-2=3.5-2X=65x=1.55x 廿=1.5 -5(43) 9.8-x=3.8X=0.39.8-x+x=3.8+x(51 ) 0.3 X7+4x=12.53.8+x=9.84x+2.1= 12.5X=9.8-3.84x+2.1-2.1=12.5-2.14x=10.4X-3=154x -4=10.4 +4X=18X=2.6(52) x+1.5-1.25=0.75(60) 13

19、.2x+9x=33.3x+1.5-1.25+1.25=0.75+1.2522.2x=33.3x+1.5=222.2x -22.2=33.3 -22.2x+1.5 X1.5=2 X1.5X=1.5X=3(61) 3x=x+100(53) 4x-1.3 X6=2.63x-x=x-x+1004x-1.3 X6+1.3 X6=2.6+1.3 X62x=1004x=10.42x +2=100 +24x +4=10.4 +4X=50X=2.6(62) x+4.8=7.2(54) 6x+12.8=15.8X=7.2-4.86x+12.8-12.8=15.8-12.8X=2.46x=3(63) 6x+18=4

20、86x *6=3 +66x+18-18=48-18X=0.56x=306x +5=30 +5(55 ) 150 X2+3x=690x=53x+300=690(64) 3(x+2.1)=10.53x+300-300=690-3003x+6.3=10.53x=3903x=10.5-6.33x +3=390 +33x=4.2X=1303x +3=4.2 +3(56) 2x-20=4X=1.42x-20+20=4+20(65) 12x-9x=8.72x=243x=8.72x +2=24 +23x +3=8.7 +3X=12X=2.9(66) 13(x+5)=169(57) 3x+6=1813x+65=

21、1693x+6-6=18-613x+65-65=169-653x=1213x=1043x +3=12 +313x +13=104 +13X=4X=8(58) 2(2.8+x)=10.4(67) 2x-97=34.25.6+2x=10.42x-97+97=34.2+972x+5.6-5.6=10.4-5.62x=131.22x=4.82x +2=131.2 +22x +2=4.8 +2X=65.6X=2.4(59) (x-3) -2=7.5(68) 3.4x-48=26.8(x-3 ) +2 X2=7.5 X23.4x-48+48=26.8+484x=4.84x +4=4.8 *4X=1.26x

22、=246x *6=24 *6(88) 13 9.25 - X=0.403X=4X=139.25-0.403(98)x+7x=8X=138.8478x=8(89) 18.9 +X=0. 3X=1X=18.9 -0.3(99) 9x-3x=6X=636x=6(90) 23x=14x + 27X=123x-14x=14x-14x+27(100 ) 15x-8=49x=276x-8+8=4+89x +9=27 *96x=12X=3X=2(91) x + 14x=75(101 )5x+x=915x=756x=915x +15=75 +156x +5=9 +5X=5x=1.5(92 ) 95 - 5x =

23、 80(102 )8x-8=6x95-5x+5x=80+5x8x-8+8=6x+85x+80=958x-6x=6x-6x+85x+80-80=95-802x=85x=152x +2=8 +2X=3X=4(93 ) 1.8 +6x = 54(103)4-x=206x=54-1.856x=52.24 4 4x + =20 +6x 北=52.2 -h65 5 5X=8.7X=25(94) 6.7x - 60.3 = 6.7(104)2x-6=126.7x=60.3+6.72x-6+6=12+66.7x=672x=186.7x -h6.7=67 北.72x +2=18 +2X=10X=9(95) 9

24、+ 4x = 53(105 )7x+7=144x=53-97x+7-7=14-74x=447x=74x +4=44 +47x +7=7 +7X=11X=1(96) 2x+8=16(106)6x-6=02x=16-86x-6+6=0+62x=86x=62x +2=8 +2X=1X=4(107)5x+6=11(97) 20x-14x=245x+6-6=11-65x=5X=16x=6(108)2x-8=10X=12x-8+8=10+8(118) 3x-3=32x=183x-3+3=3+3X=93x=6(109)2.5x-8=43x -3=6 -32.5x-8+8=4+8X=22.5x=12(119)

25、 5x-3x=42.5x -2.5=12 -2.52x=4X=4.82x +2=4 +2(110)3X=2x- =74(120) 2x+16=193 3 3X- + =7+ 2x+16-16=19-164 4 42x=3X=7.752x +2=3 +2(111 )3x+7=28X=1.53x+7-7=28-7(121) 5x+8=193x=215x+8-8=19-83x -3=21 -35x=11X=75x -5=11 -5(112)3x-7=26X=2.23x-7+7=26+7(122) 14-6x=83x=3314-6x+6x=8+6x3x -3=33 -36x+8-8=14-8X=116

26、x=6(113) 9x-x=16X=18x=16(123) 15+6x=278x+8=16 T6x+15-15=27-15X=26x=12(114) 24x+x=506x北=12北25x=50X=225x -25=50 -25(124) 5-8x=4X=25-8x+8x=4+8x(115) 1.2x-8=48x+4-4=5-41.2x-8+8=4+88x=11.2x=128x +8=1 -81.2x -1.2=12 -1.2X=0.125X=10(125) 7x+8=15(116) 3x-8=317x+8-8=15-83x-8+8=31+87x=73x=39X=13x -3=39 -3(126) 9-2x=1X=139-2x+2x=1+2x