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五年级解方程练习题180题(有答案)教学文案

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7x÷7=2.1÷7 (26) 6x-3x=18 X=0.3 3x=18 (19) 3x÷5=4.8 3x÷3=18÷3 3x÷5×5=4.8×5 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÷x+25=85 7x=42 30÷x+25-25=85-25 7x÷7=42÷7 30÷x=60 X=6 30÷x×x=60×x 30=60x (28) 0.273÷x=0.35 60x÷60=30÷60 x=0.273÷0.35 X=0.5 X=0.78 (21) 1.4×8-2x=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 X=0.54

2x=5.2 2x÷2=5.2÷2 (30) x÷0.756=90 X=2.6 x÷0.756×0.756=90×0.756 (22) 6x-12.8×3=0.06 X=68.04 6x-38.4=0.06 (31) 0.1(x+6)=3.3×0.4 6x=38.46 0.1x+0.6=1.32 6x÷6=38.46÷6 0.1x+0.6-0.6=1.32-0.6 X=6.41 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=6.5 x÷5+9-9=21-9 (25) 0.5x+8=43 x÷5=12 0.5x+8-8=43-8 x÷5×5=12×5 0.5x=35 X=60 0.5x÷0.5=35÷0.5 (35) 48-27+5x=31 X=70 5x+21-21=31-21

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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 (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 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

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(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 (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 4x=10.4 4x÷4=10.4÷4 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 2x÷2=100÷2 X=50

(62) x+4.8=7.2 X=7.2-4.8 X=2.4 (63) 6x+18=48 6x+18-18=48-18 6x=30 6x÷6=30÷6 x=5

(64)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

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(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 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) 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 3x÷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) 3.5×2= 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

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精品文档 X=139.25-0.403 (98) x+7x=8 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=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÷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 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÷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 (103) 45x=20 45x÷45=20÷45 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 (107) 5x+6=11 5x+6-6=11-6 5x=5 X=1 (108) 2x-8=10 收集于网络,如有侵权请联系管理员删除

五年级解方程练习题180题(有答案)教学文案

精品文档7x÷7=2.1÷7(26)6x-3x=18X=0.33x=18(19)3x÷5=4.83x÷3=18÷33x÷5×5=4.8×5X=63x=24(27)7(6.5+x)=87.53x
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