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五年级解方程练习题50题及答案ok

五年级解方程练习题50题及答案ok
五年级解方程练习题50题及答案ok

五年级解方程50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

(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

(27) 7(6.5+x)=87.5 (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

(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 (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

五年级解方程50题答案

(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+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

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 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

(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 (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

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