1、第 1 页 共 6 页五年级解方程50题有答案(1)(0.5+x)+x=9.82 (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)91x1.3 (12) X+8.3=10.7 (13) 15x3 (14) 3x816 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) 3x5=
2、4.8 (25) 0.5x+8=43 (26) 6x-3x=18 (27) 7(6.5+x)=87.5(28) 0.273x=0.35 (29) 1.8x=0.972 (30) x0.756=90 (31) 0.1(x+6)=3.30.4 (32) (27.5-3.5)x=4 (33) 9x-40=5 (34) x5+9=21 (35) 48-27+5x=31 第 3 页 共 6 页(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(41) x+19.8=25.8 (42) 5.6x=
3、33.6 (43) 9.8-x=3.8 (44) 75.6x=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 第 4 页 共 6 页五年级解方程50题答案(1)(0.5+x)+x=9.82 0.5+2x=4.90.5+2x-0.5=4.9-0.52x=4.42x2=4.42X=2.2(2)2(X+X+0.5)=9.8 2x+2x+1=9.84x+1-1=9.8-14x=8.84x4=8.84X=2.2(3)25000+x=6x 25000+
4、x-x=6x-x5x=250005x5=250005X=5000(4)3200=440+5X+X 6x+440=32006x+450-450=3200-4406x=27606x6=27606X=460(5)X-0.8X=6 0.2x=60.2x0.2=60.2X=30(6)12x-8x=4.8 4x=4.84x4=4.84X=1.2(7) 7.5+2X=15 2x+7.5-7.5=15-7.52x=7.52x2=7.52X=3.75(8) 1.2x=81.6 1.2x1.2=81.61.2X=68(9) x+5.6=9.4 X+5.6-5.6=9.4-5.6X=3.8(10)x-0.7x=3.
5、6 0.3x=3.60.3x0.3=3.60.3X=12(11)91x1.3 91xx=1.3x1.3x=911.3x1.3=911.3X=70(12) X+8.3=10.7 X+8.3-8.3=10.7-8.3X=2.4(13) 15x3 15x15=315X=0.2(14) 3x816 3x-8+8=16+83x=243x3=243X=8(15) 3x+9=273x+9-9=27-93x=183x3=1833x=6(16) 18(x-2)=270 18x-36=27018x-36+36=270+3618x=30618x18=30618X=17(17) 12x=300-4x 12x+4x=3
6、00-4x+4x16x=30016x16=30016X=18.75(18) 7x+5.3=7.4 7x+5.3-5.3=7.4-5.37x=2.1第 5 页 共 6 页7x7=2.17X=0.3(19) 3x5=4.8 3x55=4.853x=243x3=243X=8(20) 30x+25=8530x+25-25=85-2530x=6030xx=60x30=60x60x60=3060X=0.5(21) 1.48-2x=6 11.2-2x+2x=6+2x11.2=6+2x2x+6-6=11.2-62x=5.22x2=5.22X=2.6(22) 6x-12.83=0.06 6x-38.4=0.06
7、 6x=38.466x6=38.466X=6.41 (23) 410-3x=170 410-3x+3x=170+3x170+3x=4103x+170-170=410-1703x=2403x3=2403X=80(24) 3(x+0.5)=21 3x+1.5=213x+1.5-1.5=21-1.53x=19.53x3=19.53X=6.5(25) 0.5x+8=43 0.5x+8-8=43-80.5x=350.5x0.5=350.5X=70(26) 6x-3x=18 3x=183x3=183X=6(27) 7(6.5+x)=87.57x+45.5=87.57x+45.5-45.5=87.5-45.
8、57x=427x7=427X=6(28) 0.273x=0.35 x=0.2730.35X=0.78(29) 1.8x=0.972 1.8x1.8=0.9721.8X=0.54(30) x0.756=90 x0.7560.756=900.756X=68.04(31) 0.1(x+6)=3.30.4 0.1x+0.6=1.320.1x+0.6-0.6=1.32-0.60.1x=0.720.1x0.1=0.720.1X=7.2(32) (27.5-3.5)x=4 24x=4x=244X=6(33) 9x-40=5 9x-40+40=5+409x=459x9=459X=5(34) x5+9=21 x
9、5+9-9=21-9x5=12x55=125X=60(35) 48-27+5x=31 5x+21-21=31-21第 6 页 共 6 页5x=105x5=105X=2(36) 10.5+x+21=56 x+31.5-31.5=56-31.5x=24.5(37) x+2x+18=78 3x+18-18=78-183x=603x3=603X=20(38) (200-x)5=30 (200-x)55=305200-x=150200-x+x=150+x150+x=200X+150-150=200-150X=50(39) (x-140)70=4 (x-140)7070=470X-140=280X-140
10、+140=280+140X=420(40) 20-9x=29x=20-29x=18 9x9=189X=2(41) x+19.8=25.8 X+19.8-19.8=25.8-19.8X=6 (42) 5.6x=33.6 5.6x5.6=33.65.6X=6(43) 9.8-x=3.8 9.8-x+x=3.8+x3.8+x=9.8X=9.8-3.8X=6(44) 75.6x=12.6 X=75.612.6X=6(45) 5x+12.5=32.3 5x+12.5-12.5=32.3-12.55x=19.85x5=19.85X=3.96(46) 5(x+8)=102 5x+40=1025x+40-40=102-405x=625x5=625X=12.4(47) x+3x+10=70 4x+10=704x+10-10=70-104x=604x4=604X=15(48) 3(x+3)=50-x+3 3x+9=53-x3x+x+9-9=53-x+x-94x=444x4=444X=11(49) 5x+15=60 5x+15-15=60-155x=455x5=455X=9(50) 3.5-5x=2 3.5-5x+5x=2+5x5x+2=3.55x+2-2=3.5-25x=1.55x5=1.55X=0.3
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