2023年12月30日发(作者:数学试卷不是好卷)

五年级上册40道方程题及答案

6+x=29 x+120=196 56+x=91

解:x=29-6 解:x=196-120 解:x=91-56

x=23 x=76 x=35

12x+34x=92

解:46x=92

x=92÷46

x=2

3.6+2 x=6.3

解:2x=6.3-3.6

2x=2.7

x=2.7÷2

x=1.35

6x-3.6x=3.6

解:2.4x=3.6

x=3.6÷2.4

x=1.5

18x-14x=12

解:4x=12

x=12÷4

x=3

2.5x-5=2.5

解:2.5x=2.5+5

2.5x=7.5

x=7.5÷2.5

x=3

x+2.6=10

解:x=10-2.6

x=7.4

12+34x=46

解:34x=46-12

34x=34

x=34÷34

x=1

5x+1.4x=32

解:6.4x=32

x=32÷6.4

x=5

2x÷6=2.4

解:2x=2.4÷6

2x=0.6

x=0.6÷2

x=0.3

x+2.8=4.38 2x-0.15=6.25 3x+2=8.6

解:x=4.38-2.8 解:2x=6.25+0.15 解:3x=8.6-2

x=1.58 2x=6.4 3x=6.6

x=6.4÷2 x=6.6÷3

x=3.2 x=2.2

8x+4×2.5=42 20-4x=8

解:8x+10=42 解:20-8=4x

8x=42-10 12=4x

8x=32 4x=12

x=32÷8 x=12÷4

x=4 x=3

16.8÷(x+4)=0.3 23x=14x+14

解:16.9÷0.3=x+4 解:23x-14x=14

56=x+4 9x=14

x=56-4 x=149

x=52

89x-43x=9.2 5x-45=100

解:46x=9.2 解:5x=100+45

x=9.2÷46 5x=145

x=0.2 x=145÷5

x=29

10.5x+6.5x=51

解:17x=51

x=51÷17

x=3

133-(5+x)=80

解:133-80=5+x

53=5+x

x=53-5

x=48

1.2x-0.5x=6.3

解:0.7x=6.3

x=6.3÷0.7

x=9

83.4-2x=56 52.8-3x=48.6 x-0.7x=3.6

解:83.4-56=2x 解:52.8-48.6=3x 解:0.3x=3.6

27.4=2x 4.2=3x x=3.6÷0.3

x=27.4÷2 x=4.2÷3 x=12

x=13.7 x=1.4

26×1.5= 2x+10

解:39=2x+10

39-10=2x

29=2x

x=29÷2

x=14.5

9.25-2x=0.75

解:9.25-0.75=2x

8.5=2x

x=8.5÷2

x=4.25

52÷(x+2.62) =2.6

解:52÷2.6=x+2.62

20=x+2.62

x=20-2.62

x=17.38

4.2 x+2.5x=134

解:6.7x=134

x=134÷6.7

x=20

9.4x-0.4x=16.2

解:9x=16.2

x=16.2 ÷9

x=1.8

7x+13=33-x

解:7x+x=33-13

8x=20

x=20÷8

x=2.5

16.2÷3x=0. 3

解:16.2÷0.3=3x

54=3x

x=54÷3

x=18

2.8x-5×14=14

解:2.8x-70=14

2.8x=14+70

x=84÷2.8

x=30

130.5-5x=80

解:130.5-80=5x

50.5=5x

x=50.5÷5 x=10.1

0.5×16-16×0.2=4x 0.9×6-6x=0.6 6.7x-60.3=6.7

解:4.8=4x 解:5.4-6x=0.6 解:6.7x=6.7+60.3

4x=4.8 5.4-0.6=6x 6.7x=67

x= 4.8÷4 4.8=6x x=67÷6.7

x=1.2 6x=4.8 x=10

(x+5)÷6=1.4

解:x+5=1.4×6

x+5=8.4

x= 8.4-5

x= 3.4

x=4.8÷6

x= 0.8


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