五年级解方程180题有答案
(1)(0.5+x)+x=9.8÷2 (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)91÷x=1.3 (12) X+8.3=10.7 (13) 15x=3 (14) 3x-8=16 (15) 3x+9=27 (16) 18(x-2)=270 (17) 12x=300-4x (18) 7x+5.3=7.4 (19) 3x÷5=4.8 (25) 0.5x+8=43 (26) 6x-3x=18
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(27) 7(6.5+x)=87.5 (28) 0.273÷x=0.35 (29) 1.8x=0.972 (30) x÷0.756=90 (31) 0.1(x+6)=3.3×0.4 (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 (41) x+19.8=25.8 (42) 5.6x=33.6 (43) 9.8-x=3.8 (44) 75.6÷x=12.6 (45) 5x+12.5=32.3 (46) 5(x+8)=102 (47) x+3x+10=70
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(48) 3(x+3)=50-x+3 (49) 5x+15=60 (50) 3.5-5x=2 (51) 0.3×7+4x=12.5 (52) x÷1.5-1.25=0.75 (53) 4x-1.3×6=2.6 (54) 6x+12.8=15.8 (55) 150×2+3x=690 (56) 2x-20=4 (57) 3x+6=18 (58) 2(2.8+x)=10.4 (59) (x-3)÷2=7.5 (60) 13.2x+9x=33.3 (61) 3x=x+100
(62) x+4.8=7.2 (63) 6x+18=48 ()3(x+2.1)=10.5 (65)12x-9x=8.7 (66)13(x+5)=169 (67) 2x-97=34.2 (68)3.4x-48=26.8 (69)42x+25x=134 (70)1.5(x+1.6)=3.6
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(71)2(x-3)=5.8 (72)65x+7=137 (73) 9x+4×2.5=91
(74) 4.2 x+2.5x=134 (75) 10.5x+6.5x=51 (76) x-43x=9.2 (77) 5x-45=100 (78) 1.2x-0.5x=6.3 (79) 23.4=2x (80) 4x-x=48.6 (81) 4.5x-x=28 (82)X-5.7=2.15 (83)5X-2X=18 (84)3X+0.7=7 (85) 3.5×2= 4.2+x (86) 26×1.5= 2x+10 (87) 0.5×16―16×0.2=4x (88) 13 9.25-X=0.403 () 18.9÷X=0. 3 (90) 23x=14x+27 (91) x+14x=75 (92)95-5x=80 (93)1.8 +6x=54
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(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) 8x-8=6x
4(103) 5x=20 (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
3(110) x-4=7
(111)3x+7=28 (112) 3x-7=26 (113) 9x-x=16 (114) 24x+x=50 (115) 1.2x-8=4
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(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) 9-2x=1
(127) 4+5x=9
(128) 10-x=8
(129) 8x+9=17
(130) 9+6x=15
(131) x+9x=4+7
(132) 2x+9=17
(133) 8-4x=6 (134) 6x-7=28 (135) 7x-9=20 (136) x-56=1 (137) 8-7x=1 (138)x-30=12
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(139) 6x-21=21 (140) 6x-3=6 (141) 9x=18 (142) 4x-18=14 (162) 7x÷6=1.4 (163) 16x+34x=1 (1) 18x-14x=12
(165) 3 x-42÷14=15 (143) 5x+9=11 (144) 17-2x=11 (145) x+4+8=23 (146) 7x-12=9 (147) X-5.7=2.15 (148) 5X-2X=18 (149) 3X +0.5=5 (150) 3.5×2= 4 x (151) 26×1.5= 2x (152) 0.5×16―16×0.1=4x (153) 9.26-X=0.402 (154) 36.9÷X=0.3 (155) X÷0.5=2.6 (156) 93-5x=80 (157) 180-6x=54 (158) 9+4x=40
(159) 0.2x-0.4+0.5=3.7 (160) 9.4x-0.4x=16.2 (161) 92-4x=20
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(166) 12+4x=56 (167) 22-14x=12
(168) X+8.3=10.7 (169) 5x =30
(170) x-5.6=9.4 (171) x÷0.8=90
(172) 3x-8=16 (173) 3x+9=27 (174) 5.3+7x=7.4 (175) 3x÷5=4.8
(176) X-0.8X=6 (177) 12x+8x=4.8 (178) 7(x-2)=49 (179) 4×8+2x=36 (180) (x-2)÷3=7 (181) x÷5+9=21 (182)(300-x)÷5=30 (183) 91÷x =1.3 (184)
41-3x=1
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五年级解方程180题答案
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(1)(0.5+x)+x=9.8÷2 0.5+2x=4.9 0.5+2x-0.5=4.9-0.5 2x=4.4 2x÷2=4.4÷2 X=2.2 (2)2(X+X+0.5)=9.8 2x+2x+1=9.8
4x+1-1=9.8-1 4x=8.8 4x÷4=8.8÷4
X=2.2
(3)25000+x=6x 25000+x-x=6x-x
5x=25000 5x÷5=25000÷5 X=5000
(4)3200=440+5X+X 6x+440=3200 6x+450-450=3200-440 6x=2760 6x÷6=2760÷6
X=460
(5)X-0.8X=6 0.2x=6 0.2x÷0.2=6÷0.2
X=30
(6)12x-8x=4.8 4x=4.8 4x÷4=4.8÷4 X=1.2 (7) 7.5+2X=15 2x+7.5-7.5=15-7.5 2x=7.5 2x÷2=7.5÷2 X=3.75 (8) 1.2x=81.6 1.2x÷1.2=81.6÷1.2
X=68
(9) x+5.6=9.4 X+5.6-5.6=9.4-5.6
X=3.8
(10)x-0.7x=3.6
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0.3x=3.6 0.3x÷0.3=3.6÷0.3
X=12
(11)91÷x=1.3 91÷x×x=1.3×x 1.3x=91 1.3x÷1.3=91÷1.3
X=70
(12) X+8.3=10.7 X+8.3-8.3=10.7-8.3
X=2.4
(13) 15x=3 15x÷15=3÷15
X=0.2
(14) 3x-8=16 3x-8+8=16+8 3x=24 3x÷3=24÷3 X=8 (15) 3x+9=27 3x+9-9=27-9 3x=18 3x÷3=18÷3 3x=6 (16) 18(x-2)=270 18x-36=270 18x-36+36=270+36 18x=306 18x÷18=306÷18 X=17 (17) 12x=300-4x 12x+4x=300-4x+4x 16x=300 16x÷16=300÷16 X=18.75 (18) 7x+5.3=7.4 7x+5.3-5.3=7.4-5.3 7x=2.1 7x÷7=2.1÷7 X=0.3 (19) 3x÷5=4.8 3x÷5×5=4.8×5 3x=24
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3x÷3=24÷3 X=8 (20) 30÷x+25=85 30÷x+25-25=85-25 30÷x=60 30÷x×x=60×x 30=60x 60x÷60=30÷60 X=0.5 (21) 1.4×8-2x=6 11.2-2x+2x=6+2x 11.2=6+2x 2x+6-6=11.2-6
2x=5.2 2x÷2=5.2÷2 X=2.6
(22) 6x-12.8×3=0.06 6x-38.4=0.06 6x=38.46 6x÷6=38.46÷6
X=6.41 (23) 410-3x=170 410-3x+3x=170+3x 170+3x=410 3x+170-170=410-170 3x=240 3x÷3=240÷3 X=80 (24) 3(x+0.5)=21 3x+1.5=21 3x+1.5-1.5=21-1.5 3x=19.5 3x÷3=19.5÷3 X=6.5 (25) 0.5x+8=43 0.5x+8-8=43-8 0.5x=35 0.5x÷0.5=35÷0.5 X=70 (26) 6x-3x=18 3x=18 3x÷3=18÷3 X=6
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(27) 7(6.5+x)=87.5 7x+45.5=87.5 7x+45.5-45.5=87.5-45.5 7x=42 7x÷7=42÷7 X=6 (28) 0.273÷x=0.35 x=0.273÷0.35 X=0.78 (29) 1.8x=0.972 1.8x÷1.8=0.972÷1.8 X=0.54 (30) x÷0.756=90 x÷0.756×0.756=90×0.756 X=68.04 (31) 0.1(x+6)=3.3×0.4 0.1x+0.6=1.32 0.1x+0.6-0.6=1.32-0.6 0.1x=0.72 0.1x÷0.1=0.72÷0.1 X=7.2 (32) (27.5-3.5)÷x=4 24÷x=4 x=24÷4 X=6 (33) 9x-40=5 9x-40+40=5+40 9x=45 9x÷9=45÷9 X=5 (34) x÷5+9=21 x÷5+9-9=21-9 x÷5=12 x÷5×5=12×5 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
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(37) x+2x+18=78 3x+18-18=78-18 3x=60 3x÷3=60÷3 X=20 (38) (200-x)÷5=30 (200-x)÷5×5=30×5 200-x=150 200-x+x=150+x 150+x=200 X+150-150=200-150 X=50 (39) (x-140)÷70=4 (x-140)÷70×70=4×70 X-140=280 X-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=25.8-19.8 X=6 (42) 5.6x=33.6 5.6x÷5.6=33.6÷5.6 X=6 (43) 9.8-x=3.8 9.8-x+x=3.8+x 3.8+x=9.8 X=9.8-3.8 X=6 (44) 75.6÷x=12.6 X=75.6÷12.6 X=6 (45) 5x+12.5=32.3 5x+12.5-12.5=32.3-12.5 5x=19.8 5x÷5=19.8÷5 X=3.96 (46) 5(x+8)=102 5x+40=102
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5x+40-40=102-40 5x=62 5x÷5=62÷5 X=12.4 (47) x+3x+10=70 4x+10=70 4x+10-10=70-10 4x=60 4x÷4=60÷4 X=15 (48) 3(x+3)=50-x+3 3x+9=53-x
3x+x+9-9=53-x+x-9 4x=44 4x÷4=44÷4 X=11 (49) 5x+15=60 5x+15-15=60-15 5x=45 5x÷5=45÷5 X=9 (50) 3.5-5x=2 3.5-5x+5x=2+5x 5x+2=3.5 5x+2-2=3.5-2 5x=1.5 5x÷5=1.5÷5 X=0.3 (51) 0.3×7+4x=12.5 4x+2.1=12.5 4x+2.1-2.1=12.5-2.1 4x=10.4 4x÷4=10.4÷4 X=2.6 (52) x÷1.5-1.25=0.75 x÷1.5-1.25+1.25=0.75+1.25 x÷1.5=2
x÷1.5×1.5=2×1.5 X=3 (53) 4x-1.3×6=2.6 4x-1.3×6+1.3×6=2.6+1.3×6 4x=10.4 4x÷4=10.4÷4
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X=2.6 (54) 6x+12.8=15.8 6x+12.8-12.8=15.8-12.8 6x=3 6x÷6=3÷6 X=0.5 (55) 150×2+3x=690 3x+300=690 3x+300-300=690-300 3x=390 3x÷3=390÷3 X=130 (56) 2x-20=4 2x-20+20=4+20 2x=24 2x÷2=24÷2 X=12 (57) 3x+6=18 3x+6-6=18-6 3x=12 3x÷3=12÷3 X=4
(58) 2(2.8+x)=10.4 5.6+2x=10.4 2x+5.6-5.6=10.4-5.6 2x=4.8 2x÷2=4.8÷2 X=2.4 (59) (x-3)÷2=7.5 (x-3)÷2×2=7.5×2 X-3=15 X=18 (60) 13.2x+9x=33.3 22.2x=33.3 22.2x÷22.2=33.3÷22.2 X=1.5 (61) 3x=x+100 3x-x=x-x+100 2x=100 2x÷2=100÷2 X=50 (62) x+4.8=7.2 X=7.2-4.8
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X=2.4 (63) 6x+18=48 6x+18-18=48-18 6x=30 6x÷6=30÷6 x=5 ()3(x+2.1)=10.5 3x+6.3=10.5 3x=10.5-6.3 3x=4.2 3x÷3=4.2÷3 X=1.4 (65)12x-9x=8.7 3x=8.7 3x÷3=8.7÷3 X=2.9 (66)13(x+5)=169 13x+65=169 13x+65-65=169-65 13x=104 13x÷13=104÷13 X=8 (67) 2x-97=34.2 2x-97+97=34.2+97 2x=131.2 2x÷2=131.2÷2 X=65.6
(68)3.4x-48=26.8 3.4x-48+48=26.8+48 3.4x=74.8 3.4x÷3.4=74.8÷3.4 X=22 (69)42x+25x=134 67x=134 67x÷67=134÷67 X=2 (70)1.5(x+1.6)=3.6 1.5x+2.4=3.6 1.5x=3.6-2.4 1.5x=1.2
1.5x÷1.5=1.2÷1.5 X=0.8 (71)2(x-3)=5.8
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2x-6=5.8 2x-6+6=5.8+6 2x=11.8 2x÷2=11.8÷2 X=5.9 (72)65x+7=137 65x+7-7=137-7 65x=130 65x÷65=130÷65 X=2 (73) 9x+4×2.5=91 9x+10=91 9x+10-10=91-10 9x=81 9x÷9=81÷9 X=9 (74) 4.2 x+2.5x=134 6.7x=134 6.7x÷6.7=134÷6.7 X=20 (75) 10.5x+6.5x=51 17x=51 17x÷17=51÷17 X=3 (76) x-43x=9.2 46x=9.2 46x÷46=9.2÷46 X=0.2 (77) 5x-45=100 5x-45+45=100+45 5x=145 5x÷5=145÷5 X=29 (78) 1.2x-0.5x=6.3 0.7x=6.3 0.7x÷0.7=6.3÷0.7 X=9 (79) 23.4=2x 2x÷2=23.4÷2 X=11.7 (80) 4x-x=48.6 3x=48.6 3x÷3=48.6÷3
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X=16.2 (81) 4.5x-x=28 3.5x=28 3.5x÷3.5=28÷3.5 X=8 (82)X-5.7=2.15
X=5.7+2.15
X=7.85 (83)5X-2X=18 3x=18 3x÷3=18÷3 X=6 (84)3X+0.7=7 3x+0.7-0.7=7-0.7 3x=6.3 3x÷3=6.3÷3 X=2.1 (85) 3.5×2= 4.2+x 4.2+x=7 X=7-4.2 X=2.8 (86) 26×1.5= 2x+10 2x+10=39 2x+10-10=39-10 2x=29 2x÷2=29÷2 X=14.5 (87) 0.5×16―16×0.2=4x 4x=4.8 4x÷4=4.8÷4 X=1.2 (88) 13 9.25-X=0.403 X=139.25-0.403 X=138.847 () 18.9÷X=0. 3 X=18.9÷0.3 X=63 (90) 23x=14x+27 23x-14x=14x-14x+27 9x=27 9x÷9=27÷9 X=3 (91) x+14x=75
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15x=75 15x÷15=75÷15 X=5 (92)95-5x=80 95-5x+5x=80+5x 5x+80=95 5x+80-80=95-80 5x=15 X=3 (93)1.8 +6x=54 6x=54-1.8 6x=52.2 6x÷6=52.2÷6 X=8.7 (94) 6.7x-60.3=6.7 6.7x=60.3+6.7 6.7x=67 6.7x÷6.7=67÷6.7 X=10 (95) 9+4x=53 4x=53-9 4x=44 4x÷4=44÷4 X=11 (96) 2x+8=16 2x=16-8 2x=8 2x÷2=8÷2 X=4 (97) 20x-14x=24 6x=24 6x÷6=24÷6 X=4 (98) x+7x=8 8x=8 X=1 (99) 9x-3x=6 6x=6 X=1 (100)6x-8=4 6x-8+8=4+8 6x=12 X=2
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(101) 5x+x=9 6x=9 6x÷6=9÷6 x=1.5 (102) 8x-8=6x 8x-8+8=6x+8 8x-6x=6x-6x+8 2x=8 2x÷2=8÷2 X=4 4(103) 5x=20 4445x÷5=20÷5 X=25 (104) 2x-6=12 2x-6+6=12+6 2x=18 2x÷2=18÷2 X=9 (105) 7x+7=14 7x+7-7=14-7 7x=7 7x÷7=7÷7 X=1 (106) 6x-6=0 6x-6+6=0+6 6x=6 X=1
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