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数学题初一下册,初一计算题100道及答案

  • 数学
  • 2023-09-29

数学题初一下册?一、选择题(每小题4分,共40分). 1.A; 2.B; 3.A; 4.C; 5.B; 6.D; 7.D; 8.C; 9.C; 10.B. 二、填空题(每小题4分,共24分). 11、2; 12、 ; 13、 ; 14、 ; 15、六; 16、60. 三、那么,数学题初一下册?一起来了解一下吧。

200道数学题和答案初一

5.4÷1.8+240×1.5

=3+360

=3639000÷72×(1.25×0.7×8)

=9000÷72×7

=125×7

=87561-(1.25+2.5×0.7)

=61-3

=58[(10-0.8)+9.85]-2÷0.125

=19.05-2÷0.125

=19.05-16

=3.05

08-12×24

=

408

-

288

=

120(46+28)×60

=

74

x

60

=

444042×50-17

=

2100-

17

=

208332+105÷5

=

32

+

21

=

53420×(327-238)

=

420

x

89

=

37380(4121+2389)÷7

=

6510

÷7

=

9303.416÷(0.016×35)

=

3.416

÷0.56

=

6.10.8×[(10-6.76)÷1.2]

=

0.8

x(3.24÷1.2)

=

0.8

x

2.7

=

2.165.67×0.2-0.62

=

1.134-0.62

=

0.5140.4×0.7×0.25

=

0.4

x

0.25

x

0.7

=

0.1

x

0.7

=

0.070.78+5.436+1

=

6.216

+1

=

7.21630.8÷[14-(9.85+1.07)]

=

30.8

÷

(14

-

10.92)

=

30.8÷3.08

=

10[60-(9.5+28.9)]÷0.18

=

(60-

38.4)÷0.18

=

21.6

÷0.18

=

1202.881÷0.43-0.24×3.5

=

6.7

-

0.24

x3.5

=

6.7

-

0.84

=

5.8620×[(2.44-1.8)÷0.4+0.15]

=

20x

(0.64

÷0.4

+0.15)=

20x(1.6

+0.15)

=

20

x1.75

=

3528-(3.4+1.25×2.4)

=

28

-

(3.4

+

3)

=

28

-

6.4

=

21.62.55×7.1+2.45×7.1

=

(2.55

+

2.45)

x7.1

=

5

x7.1=35.50.8×〔15.5-(3.21+5.79)〕

=

0.8

x

(15.5

-

9)

=

0.8

x

6.5

=

5.2(31.8+3.2×4)÷5

=

(31.8

+

12.8)÷5

=

44.6÷5

=

8.9231.5×4÷(6+3)

=

126

÷

9

=

142÷2.5+2.5÷2

=

0.8

+

1.25

=2.05194-64.8÷1.8×0.9

=

194

-36

x0.9

=

194-32.4

=

161.65180-705×6

=

5180

-

4230=95024÷2.4-2.5×0.8

=10

-2=8405×(3213-3189)

=405x24

=

9720125×(97-81)

=125x16

=20006942+480÷3

=

6942

+

160

=

678220+80÷4-20

=

20

+

20

-20

=

40

-20

=

20100÷(32-30)×0

=

100

÷2

x0=

50

x0

=

025×4-12×5

=

100

-

60

=

4070×〔肆猜(42-42)÷18〕裂滚型=70

x

(0÷18)

=

70x0

=

075×65+75×35

=

75

x

(65

+35)

=

75x100

=

7500

6-1.6÷4=

6-

0.4

=

5.65.38+7.85-5.37=

13.23

-

5.37=7.867.2÷0.8-1.2×5=9

-

6

=36-1.19×3-0.43=

6-3.57

-

0.43

=

6-

(3.57

+

0.43)

=

6-4

=

26.5×(备梁4.8-1.2×4)=

6.5

x(4.8

-

4.8

)=6.5

x0

=

00.68×1.9+0.32×1.9

=

(0.68

+

0.32)

x1.9

=

1

x

1.9

=

1.910.15-10.75×0.4-5.7

=

10.15

-

4.3

-

5.7

=

10.15

-(4.3

+

5.7)=10.15

-

10

=0.155.8×(3.87-0.13)+4.2×3.74

=

5.8

x

3.74

+4.2

x

3.74

=

(5.8

+4.2)x3.74

=

10

x

3.74

=

37.432.52-(6+9.728÷3.2)×2.5

=

32.52

-

(6+3.04)x2.5

=

32.52

-

9.02

x

2.5

=

32.52

-22.55

=

9.97(136+64)×(65-345÷23)=

200x(65-15)

=

200x

50=10000

初一下数学题50道经典题

(4+8)x125

=4x125+8x125

=500+1000

=1500

58x101-58

=58x(101-1)

=58x100

=5800

5600÷(56x25)

=5600÷56÷25

=100÷25

=4

269x5+269x99-4x269

=269x(5+99-4)

=269x100

=26900

147x19+81x147

=147x(19+81)

=147x100

=14700

(25+125)x80

=25x80+125x80

=2000+10000

=12000

120÷(3分之1-4分之1)

=120÷(12分之4-12分之3)

=120÷12分之1

=120×12

=1440

10.1×89-8.9

=101x8.9-8.9x1

=8.9x(101-1)

=8.9x100

=890

9.07-22.78÷3.4

=9.07-6.7

=9.07-(7-0.3)

=9.07-7+0.3

=2.07+0.3

=2.37

5+7×(8+12)÷(4-2)

=5+7×20÷2

=5+70

=75

16x4+16x6x16

=16x4+96x16

=16x(4+96)

=16x100

=1600

7/25×4/9+7/25×5/9

=7/25×(4/9+5/9)

=7/25×1

=7/25

60×(1/12+1/15+1/4)

=60×1/12+60×1/15+60×1/4

=5+4+15

=24

(5/12-3/8)×72

=5/12×72-3/8×72

=30-27

=3

6/7-5/24÷7/12

=6/7-5/24×12/7

=12/14-5/14

=7/14

=1/2

[3/4×(7/16-1/4)]÷9/13

=3/4×(7/16-4/16)×13/9

=1/4×3/16×13/3

=13/64

2/3-7/8+1/3

=(2/3+1/3)-7/8

=1-7/8

=1/8

5/6-(3/7-1/6)

=(5/6+1/6)-3/7

=1-3/7

=4/7

1-1/3-2/3

=1-(1/3+2/3)

=1-1

=0

1+3/5-1/10

=1+6/10-1/10

=1+1/2

=1又1/2

3/8-12/13+5/8

=3/8+5/8-12/13

=1-12/13

=1/13

1-(1/2-3/4)

=1+3/4-2/4

=1+1/4

=5/4

1-1/2-1/4

=1/2-1/4

=2/4-1/4

=1/4

2/7-8/9+5/7

=(2/7+5/7)-8/搏桐9

=1-8/9

=1/9

2-1/4-3/4

=2-(1/基茄4+3/4)

=2-1

=1

1/2-(3/8-1/2)

=1/2+1/2-3/4

=1-3/8

=5/8

2.64×1.7-2.64×0.7

=2.64×(1.7-0.7)

=2.64×1

=2.64

31.5×1.07-3.15×0.7

=3.15×10.7-3.15×0.7

=3.15×(10.7-0.7)

=3.15×10

=31.5

2.7×5.7-2.7+5.3×2.7

=2.7×(5.7-1+5.3)

=2.7×10

=27

0.625÷0.125×0.8

=(0.625×0.8)×8÷(0.125×8)

=0.5×8÷1

=4

18.6×6.1+3.9×18.6

=18.6×(6.1+3.9)

=18.6×10

=186

52.5x2.9+5.45

=5.25x29+5.25+0.2

=5.25×(29+1)+0.2

=5.25×30+0.2

=157.5+0.3

=157.7

0.92x15+0.08x15

=(0.92+0.08)×15

=1×15

=15

0.72×1.25×2.5

=0.9×(0.8×1.25)×2.5

=0.9×1×2.5

=2.25

400.6x7-2003x0.4

=200.3x14-200.3x4

=200.3×(14-4)

=200.3×10

=2003

300÷125÷8

=300÷(125×8)

=300÷1000

=0.3

396-96-172-28

=(396-96)-(172+28)

=300-200

=100

125x24

=125x8x3

=1000x3

=3000

26x15

=(20+6)x15

=20x15+6x15

=300+90

=390

25x99x4

=25x4x99

=100x99

=9900

250x32

=250x4x8

=1000x8

=8000

(98+98+98+98)x25

=4x98x25

=4x25x98

=100x98

=9800

3/基锋坦4÷5/8×3/10

=3/4×8/5×3/10

=9/5×1/5

=9/25

1.25×(8+10)

=1.25×8+1.25×10

=10+12.5

=22.5

1.24+0.78+8.76

=(1.24+8.76)+0.78

=10+0.78

=10.78

1/2-(4/5-1/2)

=1/2+1/2-4/5

=1-4/5

=1/5

4800÷25÷4

=4800÷(25x4)

=4800÷100

=4800÷100

=48

2/5-(3/8-3/5)

=2/5+3/5-3/8

=1-3/8

=5/8

3/4-(3/7-1/4)

=3/4+1/4-3/7

=1-3/7

=4/7

3.2x0.125x2.5

=0.125x8x(0.4x2.5)

=1x1

=1

0.4×125×25×0.8

=(0.4×25)×(125×0.8)

=10×100

=1000

1.25×(8+10)

=1.25×8+1.25×10

=10+12.5

=22.5

9123-(123+8.8)

=9123-123-8.8

=9000-8.8

=8991.2

1.24×8.3+8.3×1.76

=8.3×(1.24+1.76)

=8.3×3

=24.9

9999×1001

=9999×(1000+1)

=9999×1000+9999×1

=10008999

14.8×6.3-6.3×6.5+8.3×3.7

=(14.8-6.5)×6.3+8.3×3.7

=8.3×6.3+8.3×3.7

=8.3×(6.3+3.7)

=8.3×10

=83

1.24+0.78+8.76

=(1.24+8.76)+0.78

=10+0.78

=10.78

933-157-43

=933-(157+43)

=933-200

=733

4821-998

=4821-1000+2

=3823

32×125×25

=4×8×125×25

=(4×25)×(8×125)

=100×1000

=100000

1.8+18÷1.5-0.5×0.3

=1.8+12-0.15

=13.8-0.15

=13.65

6.5×8+3.5×8-47

=52+28-47

=80-47

3.7x2.56-2.3

=9.472-2.3

=7.172

1.24+0.78+8.76

=(1.24+8.76)+0.78

=10+0.78

=10.78

1/2-(4/5-1/2)

=1/2+1/2-4/5

=1-4/5

=1/5

4800÷25÷4

=4800÷(25x4)

=4800÷100

=4800÷100

=48

2/5-(3/8-3/5)

=2/5+3/5-3/8

=1-3/8

=5/8

3/4-(3/7-1/4)

=3/4+1/4-3/7

=1-3/7

=4/7

3.2x0.125x2.5

=0.125x8x(0.4x2.5)

=1x1

=1

0.4×125×25×0.8

=(0.4×25)×(125×0.8)

=10×100

=1000

1.25×(8+10)

=1.25×8+1.25×10

=10+12.5

=22.5

9123-(123+8.8)

=9123-123-8.8

=9000-8.8

=8991.2

1.24×8.3+8.3×1.76

=8.3×(1.24+1.76)

=8.3×3

=24.9

9999×1001

=9999×(1000+1)

=9999×1000+9999×1

=10008999

14.8×6.3-6.3×6.5+8.3×3.7

=(14.8-6.5)×6.3+8.3×3.7

=8.3×6.3+8.3×3.7

=8.3×(6.3+3.7)

=8.3×10

=83

1.24+0.78+8.76

=(1.24+8.76)+0.78

=10+0.78

=10.78

933-157-43

=933-(157+43)

=933-200

=733

4821-998

=4821-1000+2

=3823

32×125×25

=4×8×125×25

=(4×25)×(8×125)

=100×1000

=100000

9/17x8/13-13/17/8

=9/17x8/13-13/17x1/8

=72/221-13/136

=576/1768-169/1768

=407/1768

9/17x8/13+8/13/(17/8)

=9/17x8/13+8/13x8/17

=8/13x(9/17+8/17)

=8/13x1

=8/13

10.1×89-8.9

=10.1x89-89x0.1

=89x(10.1-0.1)

=89x10

=890

4x+8=4

解:4x=4-8

4x=-4

x=-4÷4

x=-1

12x+8x-12=28

解:20x=28+12

20x=40

x=40÷20

x=2

4x+2.1=8.5

解:4x=8.5-2.1

4x=6.4

x=6.4÷4

x=1.6

65y-30=100

解:65y=100+30

65y=130

y=130÷65

y=2

15x-7.5x=15

解:7.5x=15

x=15÷7.5

x=2

25%x=5

解:1/4x=5

x=5*4

x=20

20-15%x=17

解:0.15x=20-17

0.15x=3

x=3÷0.15

x=20

25%x=5

解:0.25x=5

x=5÷0.25

x=20

80%X=6/15X+96

解:4/5X=2/5X+96

4/5X-2/5X=96

2/5X=96

X=96*5/2

X=48*5

X=240

15%X+10-X=10*32%

解:0.15X-X=3.2-10

-0.85X=-6.8

X=-6.8÷(-0.85)

X=8

15%X+10-X=10*32%

解:0.15X+10-X=3.2

X-0.15X=10-3.2

0.85X=6.8

X=6.8÷0.85

X=8

8÷x=0.4

解:8÷x*x=0.4*x

0.4x=8

0.4x÷0.4=8÷0.4

x=20

5x+8x=4.7

解:13x=4.7

x=4.7/13

x=47/130

2*20x=10(60-x)

解:40x=600-10x

40x+10x=600

50x=600

x=600÷50

x=12

x÷75+x÷60=36

解:1/75x+1/60x=36

4/300x+5/300x=36

9/300x=36

x=36*300/9

x=12*100

x=1200

x-0.7x=16

解:(1-0.7)x=16

0.3x=16

x=16÷0.3

x=16/0.3

x=160/3

8(x-4)+5=45

解:8(x-4)=45-5

8(x-4)=40

x-4=40÷8

x-4=5

x=5+4

x=9

(x+10)*2.4+4=x+25+10

解:2.4x+24+4=x+35

2.4x+28=x+35

2.4x-x=35-28

1.4x=7

x=7÷1.4

x=5

4x+8=4

解:4x+8-8=4-8——等式性质

4x=-4

4x÷4=-4÷4

x=-1

7.8x-14=40

解:7.8x=40+14

7.8x=54

x=54/7.8

x=540/78

x=90/13

5x+30=6x-10

解:6x-5x=30+10

x=40

4x+8=4——方程两边除以4

解:x+2=1

x=1-2

x=-1

x:6.5=6:4

解:4x=6.5*6

4x=39

x=39/4

x=9.75

8.6x+3*6=52.4

解:8.6x+18=52.4

8.6x=52.4-18

8.6x=34.4

x=34.4÷8.6

x=4

x/5.2-1.6=1.8

解:x/5.2=1.8+1.6

x/5.2=3.4

x=3.4*5.2

x=17.68

225x=239.2x

解:239.2x-225x=0

14.2x=0

x=0÷14.2

x=0

80x+(80-20)(x+10)=4800

解:80x+60(x+10)=4800

80x+60x+600=4800

140x=4800-600

140x=4200

x=4200÷140

x=30

1.5x-0.6*15=18

解:1.5x-9=18

1.5x=18+9

1.5x=27

x=27÷1.5

x=18

6x+4(2x-1)+3(45-3x)=171

解:6x+8x-4+135-9x=171

6x+8x-9x+131=171

5x=171-131

5x=40

x=40÷5

x=8

9x*2+18*6x+17*2x=12.8

解:(18+108+34)x=12.8

160x=12.8

x=12.8÷160

x=0.08

1-4*[1/x+1/(x+5)]=(x-4)*[1/(x+5)]

解:x(x+5)-[4(x+5)+4x]=x(x-4)

x²+5x-(4x+20+4x)=x²-4x

x²+5x-8x-20=x²-4x

x²-x²-3x+4x-20=0

4x-3x=20

x=20

2x*(x-1)-x*(2x+3)=15

解:2x²-2x-2x²-3x=15

-5x=15

x=15÷(-5)

x=-3

2分之x+5分之1=3分之1x

解:2分之1x-3分之1x=-5分之1

6分之3x-6分之2x=-5分之1

6分之1x=-5分之1

x=-5分之1*6

x=-5分之6

x=-1又5分之1

8(3x+3)=72

解:3x+3=72÷8

3x+3=9

3x=9-3

3x=6

x=6÷3

x=2

8(3x+3)=72

解:24*(x+1)=72

x+1=72÷24

x+1=3

x=3-1

x=2

8(3x+3)=72

解:24x+24=72

24x=72-24

24x=48

x=48÷24

x=2

4(y+2)=24

解:y+2=24÷4

y+2=6

y=6-2

y=4

4(y+2)=24

解:4y+8=24

4y=24-8

4y=16

y=16÷4

y=4

3x+12.4=5x-3.6

解:5x-3x=12.4+3.6

2x=16

x=16÷2

x=8

x-80%x-6=16

解:x-0.8x=16+6

0.2x=22

x=22÷0.2

x=110

x-0.1x=55.404

解:(1-0.1)x=55.404

0.9x=55.404

x=55.404÷0.9

x=61.56

x+12−1/4x=1

解:x-1/4x=1-12

3/4x=-11

x=-11*4/3

x=-44/3

9分之8÷(2x)=8分之5

解:8分之5*2x=9分之8

4分之5x=9分之8

x=9分之8*5分之4

x=45分之32

5x+30=6x-10

解:6x-5x=30+10

x=40

22%x=34

解:11/50x=34

x=34*50/11

x=1700/11

7分之2x:3分之2=6

解:7分之2x=6*3分之2

7分之2x=4

x=4*2分之7

x=14

0.5x+3分之1x=9分之5

解:2分之1x+3分之1x=9分之5

6分之3x+6分之2x=9分之5

6分之5x=9分之5

x=9分之5*5分之6

x=3分之2

2x-20%×10=4.22

解:2x-2=4.22

2x=4.22+2

2x=6.22

x=6.22÷2

x=3.11

(1-65%)*X=8

解:(1-0.65)X=8

0.35X=8

X=8÷0.35

X=800/35

X=160/7

3分之2X=9分之4

解:X=9分之4*2分之3

X=3分之2

3分之2X+4分之1=12

解:3分之2X=4分之48-4分之1

3分之2X=4分之47

X=4分之47*2分之3

X=8分之141

3X-7分之5X=7分之2

解:7分之21X-7分之5X=7分之2

7分之16X=7分之2

X=7分之2*16分之7

X=8分之1

3X+5=5X-1

解:5X-3X=5+1

2X=6

X=6÷2

X=3

4x-1.5x=5

解:2.5x=5

x=5÷2.5

x=2

X+3.6=2.5X-3.6

解:2.5X-X=3.6+3.6

1.5X=7.2

X=7.2÷1.5

X=4.8

x+3.6=2.5x-3.6

解:2.5x-x=3.6+3.6

1.5x=7.2

x=7.2÷1.5

x=4.8

x-470.25=182

解:x=182+470.25

x=652.25

x÷4=6.34

解:x=6.34*4

x=25.36

8(x+2.4)=83.2

解:x+2.4=83.2÷8

x+2.4=10.4

x=10.4-2.4

x=8

7分之2x=21分之8

解:x=21分之8*2分之7

x=3分之4

x=1又3分之1

9分之8÷2x=8分之5

解:9分之8*2分之1x=8分之5

9分之4x=8分之5

x=8分之5*4分之9

x=32分之45

3.2+2x=9.8

解:1.6+x=4.9

x=4.9-1.6

x=3.3

1/3x-1/4x=12

解:4/12x-3/12x=12

1/12x=12

x=12*12

x=144

1/6x+2/3x=20

解:1/6x4/6x=20

5/6x=20

x=20*6/5

x=4*6

x=24

1/2x+1/3x=5/6

解:(1/2x+1/3x)×6=5/6×6

3x+2x=5

5x=5

x=5÷5

x=1

2x/3+5x/7=23/42

解:(2x/3+5x/7)×42=23/42×42

28x+30x=23

58x=23

x=23/58

5/6-x=1/4

解:x=5/6-1/4

x=10/12-3/12

x=7/12

x÷4/5=2/7

解:x=2/7×4/5

x=8/35

19/8-1/7x=1/8

解:1/7x=9/4

x=63/4

x=15又3/4

14+5x=42

解:5x=42-14

5x=28

x=28/5

x=5.6

7×5+65x=100

解:35+65x=100

65x=100-35

x=65/65

x=1

4x-8*7=28

解:4x=28+56

x=84/4

x=21

8x-x+18=67

解:7x+18=67

7x=67-18

7x=49

x=49÷7

x=7

x+15=200

解:x=200-15

x=185

x/2+x/3=5/6

解:(x/2+x/3)×6=5/6×6

3x+2x=5

5x=5

x=5÷5

x=1

2x/3+5x/7=23/42

解:(2x/3+5x/7)×42=23/42×42

28x+30x=23

58x=23

x=23/58

5*8+2X=60

解:40+2X=60

2X=60-40

X=20÷2

X=10

5(8+2X)=60

解:8+2X=60÷5

8+2X=12

2X=12-8

X=4÷2

X=2

5(8+2X)=60

解:8+2X=60÷5

8/2+2X/2=12/2

4+X=6

X=6-4

X=2

X-5%X=12.6

解:0.95X=12.6

X=12.6/0.95

X=1260/95

X=252/19

5分之3÷5分之6-3X=5分之1

解:3X=5分之3*6分之5-5分之1

3X=2分之1-5分之1

3X=10分之5-10分之2

3X=10分之3

X=10分之3*3分之1

X=10分之1

(X+5分之3)*50%=4

解:X+5分之3=4÷0.5

X=8-5分之3

X=7又5分之2

5分之4X-4=60

解:5分之4X=60+4

X=64*4分之5

X=16*5

X=80

1÷(X-3分之2X)=5分之4

解:5分之4*3分之1X=1

15分之4X=1

X=1*4分之15

X=4分之15

3.2+2x=9.8

解:2x=9.8-3.2

2x=6.6

x=6.6÷2

x=3.3

(8+x)*3=60

解:8+x=60÷3

8+x=20

x=20-8

x=12

(8+x)*3=60

解:24+3x=60

3x=60-24

3x=36

x=36÷3

x=12

七年级数学试卷免费

1) x+y=4①

x-y=2

①+②:2x=6

x=3

x=3代入①:3+y=4

y=1

(2) x+2y=32 ①

x-y=8②

由①得,x=32-2y ③

把③代入② 32-2y-y=8

32-3y=8

3y=24

y=8

y=8代入③ :x=32-2×8=16

(3)2x+2y=1①

6x-6y=1②

②可简化为:2x-2y=1/3③

①+③ :4x=4/3,

x=1/3

将x=1/3,代入③中,y=1/6

(4)x+2y=5①

3x+y=10②

由①: x=5-2y代入②:3(5-2y)+y=10

15-6y+y=10

y=1

y=1代入①:x=5-2y=3

(5)租谈5x-y=2①

4x-y=7②

②-①:-x=5

x=-5

x=-5代入①:5×(-5)-y=2

y=-27

(6)2x-y=3 ①

3x+2y=8 ②

①×2+②:7x=14

x=2

x=2 代入①:y=2×2-3

y=1

(7) 2x-y=5 ①

3x+4y=2 ②

①×4+②:11x=22

x=2

x=2 代入①:2×2-y=5

y=-1

(8)2x-3y=7 ①

x-3y=7 ②

①-②:x=0

x=0 代入②-3y=7

y=-3/指型纯7

(9)2x+y=5 ①

x-3y=6 ②

①-②×2:7y=-7

y=-1

y=-1 代入②:x-3×(-1)=6

x=3

(10) x+3y=7 ①

y-x=1 ②

①+②:唯咐4y=8

y=2

y=2 代入②:2-x=1

x=1

七年级数学下册大题合集

(1) x+y=4①

x-y=2

①+②:2x=6

x=3

x=3代入①:3+y=4

y=1

(2) x+2y=32 ①

x-y=8②

由①得,x=32-2y ③

把③代入②差李 32-2y-y=8

32-3y=8

3y=24

y=8

y=8代入③ :x=32-2×8=16

(3)2x+2y=1①

6x-6y=1②

②可简化为:2x-2y=1/3③

①+③ :4x=4/3,

x=1/3

将x=1/3,代入③中,y=1/6

(4)x+2y=5①

3x+y=10②

由团庆盯①: x=5-2y代入②:3(5-2y)+y=10

15-6y+y=10

y=1

y=1代入①:x=5-2y=3

(5)5x-y=2①

4x-y=7②

②-①:-x=5

x=-5

x=-5代入①:5×(-5)-y=2

y=-27

(6)2x-y=3 ①

3x+2y=8 ②

①×2+②:7x=14

x=2

x=2 代入①:y=2×2-3

y=1

(7) 2x-y=5 ①

3x+4y=2 ②

①×4+②:塌和11x=22

x=2

x=2 代入①:2×2-y=5

y=-1

(8)2x-3y=7 ①

x-3y=7 ②

①-②:x=0

x=0 代入②-3y=7

y=-3/7

(9)2x+y=5 ①

x-3y=6 ②

①-②×2:7y=-7

y=-1

y=-1 代入②:x-3×(-1)=6

x=3

(10) x+3y=7 ①

y-x=1 ②

①+②:4y=8

y=2

y=2 代入②:2-x=1

x=1

我只能提供这么多,应为我也在找不等式

初一计算题100道及答案

不等式..不定式30道哪去给你找~

某某家承包了一个果园,去年果园收支相抵后,结余12000元兄凯.今滚尘余天水果丰收,估计收人可比去年增加20%:并且今天因为改进了种植技术,支出比去年减少10%,这样今年结余预计比去年多11400元.请计算大滚某某家今年种植水果的收入和支出情况.

先扔给你一道吧~二元一次方程应用

以上就是数学题初一下册的全部内容,8.在代数式 中, 的同类项是 ,6的同类项是 。 求初一上学期100道数学题(计算、方程共45道,化简求值20道,应用题20道,几何体15道 好的再追加分! 1、。

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