五年級(jí)解方程練習(xí)及答案

1、五年級(jí)解方程題有答案 (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=1

2、8 (10)x-0.7x=3.6 (27) 7(6.5+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=3

3、1 (47) x+3x+10=70 (36) 10.5+x+21=56 (48) 3(x+3)=50-x+3 (37) x+2x+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)

4、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(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)

5、 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) 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) 20 x-14x=24 (86) 26 X1.5=

6、2x+10 (98)x+7x=8 (87) 0.5 X16 16 X0.2=4x (99)9 x-3x=6 (111)3x+7=28 (100) 6x-8=4 (112) 3x-7=26 (101) 5x+x=9 (113) 9x-x=16 (102) 8x-8=6x (114) 24x+x=50 (103) 4 4x=20 5 (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-

7、8=10 (120) 2x+16=19 (109) 2.5x-8=4 (121) 5x+8=19 (110) 3 7 x- 一 =7 4 (122) 14-6x=8 (123) 15+6x=27 (135) 7x-9=20 (124) 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 (

8、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 24 / 19 (146)7x-12=9 (158) 9 + 4x = 40 (147)X-5.7=2.15 (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 X2= 4 x (162) 7x +6=1.4 (151) 26 X1.5= 2x (

9、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 = 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

10、) 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 五年級(jí)解方程180題答案 (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+ 仁 9.8 4x+1-

11、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 廿=25000 -5 X=5000 (4) 3200=440+5X+X 6x+440=3200 6x+450-450=3200-440 6x=2760 6x -5=2760 -5 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

12、.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 0.3x=3.6 0.3x *0.3=3.6 -).3 X=12 (11) 91 -x= 1.3 91 -xXx=1.3 Xx 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

13、+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 0.5x+8-8=43-8 (18) 7x+5.3=7.4 0.5x=35 7x+5.3-5.3=7.4-5.3 0.5x *0.5=35 -0.5 7x=2.1 X=70 7

14、x -7=2.1 -7 (26) 6x-3x=18 X=0.3 3x=18 (19) 3x 廿=4.8 3x -3=18 -3 3x 廿 X5=4.8 X5 X=6 3x=24 (27) 7(6.5+x)=87.5 3x -3=24 -3 7x+45.5=87.5 X=8 7x+45.5-45.5=87.5-45.5 (20) 30 +25=85 7x=42 30 +x+25-25=85-25 7x -7=42 30 -c=60 30 -xXx=60 Xx X=6 30=60 x (28) 0.273 -x=0.35 60 x 北0=30 北0 x=0.273 -0.35 X=0.5 X=0.

15、78 (21) 1.4 X8-2x=6 11.2-2x+2x=6+2x (29) 1.8x=0.972 11.2=6+2x 1.8x -1.8=0.972 -1.8 2x+6-6=11.2-6 2x=5.2 X=0.54 2x +2=5.2 2 (30) x -0.756=90 X=2.6 x -0.756 X0.756=90 X0.756 (22) 6x-12.8 X3=0.06 X=68.04 6x-38.4=0.06 (31) 0.1(x+6)=3.3 X0.4 6x=38.46 0.1x+0.6=1.32 6x 北=38.46 北 0.1x+0.6-0.6=1.32-0.6 X=6.4

16、1 0.1x=0.72 (23) 410-3x=170 0.1x -0.1=0.72 -0.1 410-3x+3x=170+3x X=7.2 170+3x=410 (32) (27.5-3.5) -x=4 3x+170-170=410-170 24 -x=4 3x=240 x=24 -4 3x -3=240 -3 X=6 X=80 (33) 9x-40=5 (24)3(x+0.5)=21 9x-40+40=5+40 3x+1.5=21 9x=45 3x+1.5-1.5=21-1.5 9x -9=45 +9 3x=19.5 X=5 3x -3=19.5 -3 (34) x-5+9=21 X=6.

17、5 x-5+9-9=21-9 (25) 0.5x+8=43 x-5=12 x 廿 X5=12 X5 X=9.8-3.8 X=60 X=6 (35) 48-27+5x=31 (44) 75.6 -x=12.6 5x+21-2 仁31-21 X=75.6 -12.6 5x=10 X=6 5x -5=10 廿 X=2 (45) 5x+12.5=32.3 (36) 10.5+x+21=56 5x+12.5-12.5=32.3-12.5 x+31.5-31.5=56-31.5 5x=19.8 x=24.5 5x 廿=19.8 -5 (37) x+2x+18=78 X=3.96 3x+18-18=78-1

18、8 (46) 5(x+8)=102 3x=60 5x+40=102 3x -3=60 3 5x+40-40=102-40 X=20 5x=62 (38) (200-x) -5=30 5x -h5=62 廿 (200-x) -5 X5=30 X5 X=12.4 200-x=150 (47) x+3x+10=70 200-x+x=150+x 4x+10=70 150+x=200 4x+10-10=70-10 X+150-150=200-150 4x=60 X=50 4x 4=60 4 X=15 (39) (x-140) -70=4 (48) 3(x+3)=50-x+3 (x-140) -70 X7

19、0=4 X70 3x+9=53-x X-140=280 3x+x+9-9=53-x+x-9 X-140+140=280+140 4x=44 X=420 4x 4=44 4 (40)20-9x=2 X=11 9x=20-2 9x=18 (49) 5x+15=60 9x +9=18 +9 5x+15-15=60-15 X=2 5x=45 (41) x+19.8=25.8 5x +5=45 5 X+19.8-19.8=25.8-19.8 X=9 X=6 (50) 3.5-5x=2 3.5-5x+5x=2+5x (42 ) 5.6x=33.6 5x+2=3.5 5.6x 弋.6=33.6 *5.6 5

20、x+2-2=3.5-2 X=6 5x=1.5 5x 廿=1.5 -5 (43)9.8-x=3.8 X=0.3 9.8-x+x=3.8+x (51 ) 0.3 X7+4x=12.5 3.8+x=9.8 4x+2.1= 12.5 4x+2.1-2.1=12.5-2.1 (x-3 ) +2X2=7.5 X2 4x=10.4 X-3=15 4x -4=10.4 +4 X=18 X=2.6 (52)x+1.5-1.25=0.75 (60)13.2x+9x=33.3 x+1.5-1.25+1.25=0.75+1.25 22.2x=33.3 x+1.5=2 22.2x -22.2=33.3 -22.2 x+

21、1.5 X1.5=2 X1.5 X=1.5 X=3 (61)3x=x+100 (53)4x-1.3 X6=2.6 3x-x=x-x+100 4x-1.3 X6+1.3 X6=2.6+1.3 X6 2x=100 4x=10.4 2x +2=100 +2 4x +4=10.4 +4 X=50 X=2.6 (62)x+4.8=7.2 (54)6x+12.8=15.8 X=7.2-4.8 6x+12.8-12.8=15.8-12.8 X=2.4 6x=3 (63)6x+18=48 6x +5=3 +6 6x+18-18=48-18 X=0.5 6x=30 6x +5=30 +5 (55 )150 X2

22、+3x=690 x=5 3x+300=690 (64) 3(x+2.1)=10.5 3x+300-300=690-300 3x+6.3=10.5 3x=390 3x=10.5-6.3 3x +3=390 +3 3x=4.2 X=130 3x +3=4.2 +3 (56)2x-20=4 X=1.4 2x-20+20=4+20 (65) 12x-9x=8.7 2x=24 3x=8.7 2x +2=24 +2 3x +3=8.7 +3 X=12 X=2.9 (66) 13(x+5)=169 (57)3x+6=18 13x+65=169 3x+6-6=18-6 13x+65-65=169-65 3x=

23、12 13x=104 3x +3=12 +3 13x +13=104 +13 X=4 X=8 (58)2(2.8+x)=10.4 (67)2x-97=34.2 5.6+2x=10.4 2x-97+97=34.2+97 2x+5.6-5.6=10.4-5.6 2x=131.2 2x=4.8 2x +2=131.2 +2 2x +2=4.8 +2 X=65.6 X=2.4 (59)(x-3) -2=7.5 (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

24、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 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 北5=130 北5 X=2 (73) 9x+4 X2.5 = 91 9x+10=91 9x+10-10=91-10 9x=81 9x +9=81 +9 X=9 (74) 4.2 x+2

25、.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) 89x-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 3

26、x +3=48.6 +3 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 X2= 4.2+x 4.2+x=7 X=7-4.2 X=2.8 (86) 26 X1.5= 2x+10 2x+10=39 2x+10-10=39-10 2x=29 2x +2=29 +2 X=14

27、.5 (87) 0.5 X16 16 X0.2=4x (97) 20 x-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 (101 )5x+x=9 6x=9 6x +5=9 +5 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) x=20 5 4 44 _ x + =20 + 5 55 X=25 (104)2x-6=12 2x-6+6

28、=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 (107) 5x+6=11 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 (89) 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=

29、75 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 北=52.2 -h6 X=8.7 (94) 6.7x 60.3 = 6.7 6.7x=60.3+6.7 6.7x=67 6.7x -h6.7=67 北.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

30、+2 X=4 X=13 (117) 6x+6=12 6x+6-6=12-6 6x=6 X=1 (118) 3x-3=3 3x-3+3=3+3 3x=6 3x -3=6 -3 X=2 (119) 5x-3x=4 2x=4 2x +2=4 +2 X=2 (120) 2x+16=19 2x+16-16=19-16 2x=3 2x +2=3 +2 X=1.5 (121) 5x+8=19 5x+8-8=19-8 5x=11 5x -5=11 -5 X=2.2 (122) 14-6x=8 14-6x+6x=8+6x 6x+8-8=14-8 6x=6 X=1 (123) 15+6x=27 6x+15-15=

31、27-15 6x=12 6x北=12北 X=2 (124) 5-8x=4 5-8x+8x=4+8x 8x+4-4=5-4 8x=1 8x +8=1 -8 X=0.125 (125) 7x+8=15 7x+8-8=15-8 7x=7 X=1 5x+6-6=11-6 5x=5 X=1 (108)2x-8=10 2x-8+8=10+8 2x=18 X=9 (109 )2.5x-8=4 2.5x-8+8=4+8 2.5x=12 2.5x -2.5=12 -2.5 X=4.8 3 (110 )x- =7 4 3 33 X- + =7+ - 4 44 X=7.75 (111 )3x+7=28 3x+7-7

32、=28-7 3x=21 3x -3=21 -3 X=7 (112) 3x-7=26 3x-7+7=26+7 3x=33 3x -3=33 3 X=11 (113) 9x-x=16 8x=16 8x+8=16 -8 X=2 (114) 24x+x=50 25x=50 25x -25=50 -25 X=2 (115) 1.2x-8=4 1.2x-8+8=4+8 1.2x=12 1.2x -1.2=12 -1.2 X=10 (116) 3x-8=31 3x-8+8=31+8 3x=39 3x -3=39 -3 7x=28 7x +7=28 +7 X=4 (136) x-56=1 X=56+1 X=5

33、7 (137) 8-7x=1 8-7x+7x=1+7x 7x+1-1=8-1 7x=7 X=1 (138) x-30=12 X-30+30=12+30 X=42 (139) 6x-21=21 6x-21+21=21+21 6x=42 6x *6=42 *6 X=7 (140) 6x-3=6 6x-3+3=6+3 6x=9 6x +5=9 +5 X=1.5 (141) 9x=18 9x +9=18 +9 X=2 (142) 4x-18=14 4x-18+18=14+18 4x=32 4x +4=32 +4 X=8 (143) 5x+9=11 5x+9-9=11-9 5x=2 5x -5=2 廿

34、X=0.4 (144) 17-2x=11 17-2x+2x=11+2x 2x+11-11=17-11 2x=6 2x +2=6 +2 X=3 (126) 9-2x=1 9-2x+2x=1+2x 2x+1-仁9-1 2x=8 2x +2=8 +2 X=4 (127) 4+5x=9 5x+4-4=9-4 5x=5 X=1 (128) 10-x=8 X=10-8 X=2 (129) 8x+9=17 8x+9-9=17-9 8x=8 X=1 (130) 9+6x=15 6x+9-9=15-9 6x=6 X=1 (131) x+9x=4+7 10 x=11 10 x +10=11 +10 X=1.1 (

35、132) 2x+9=17 2x+9-9=17-9 2x=8 2x +2=8 +2 X=4 (133) 8-4x=6 8-4x+4x=6+4x 4x+6-6=8-6 4x=2 4x +2=2 +4 X=0.5 (134) 6x-7=28 6x-7+7=28+7 6x=36 6x *6=36 +6 X=6 (135) 7x-9=20 7x-9+9=8+20 (145) x+4+8=23 X+12=23 X=23-12 X=11 (146) 7x-12=9 7x-12+12=9+12 7x=21 7x -7=21 -7 X=3 (147) X-5.7=2.15 x=5.7+2.15 X=7.85 (

36、148) 5X-2X=18 3x=18 3x -3=18 -3 X=6 (149) 3X +0.5=5 3x+0.5-0.5=5-0.5 3x=4.5 3x -3=4.5 3 X=1.5 (150) 3.5 X2= 4 x 4x=7 4x -4=7 -4 X=1.75 (151) 26 X1.5= 2x 2x=39 2x +2=39 +2 X=18 (152) 0.5 X16 16 X0.1=4x 4x=6.4 4x -4=6.4 -4 X=1.6 (153) 9.26 X=0.402 X=9.26-0.402 X=8.858 (154) 36.9 -X=0.3 X=36.9 -3.3 X=1

37、23 (155) X -0.5=2.6 X=0.5 X2.6 X=1.3 (156) 93 5x = 80 93-5X+5X=80+5X 5X+80-80=93-80 5X=13 5X 廿=13 -5 X=2.6 (157) 180-6x = 54 180-6X+6X=54+6X 6X+54-54=180-54 6X=126 6X北=126北 X=21 (158) 9 + 4x = 40 4X+9-9=40-9 4X=31 4X -4=31 -4 X=7.75 (159) 0.2x 0.4 + 0.5 = 3.7 0.2X-0.5+0.5-0.4+0.4=3.7-0.5+0.4 0.2X=3.6 0.2X -0.2=3.6 -0.2 X=18 (160) 9