七下数学计算题400道(七下数学计算题400道及答案人教版)
七下数学计算题400道(七下数学计算题400道及答案人教版)

七年级下册数学计算题100道

1.3/7 × 49/9 - 4/3

2.8/9 × 15/36 + 1/27

3.12× 5/6 – 2/9 ×3

4.8× 5/4 + 1/4

5.6÷ 3/8 – 3/8 ÷6

6.4/7 × 5/9 + 3/7 × 5/9

7.5/2 -( 3/2 + 4/5 )

8.7/8 + ( 1/8 + 1/9 )

9.9 × 5/6 + 5/6

10.3/4 × 8/9 - 1/3

0.12χ+1.8×0.9=7.2 (9-5χ)×0.3=1.02 6.4χ-χ=28+4.4

11.7 × 5/49 + 3/14

12.6 ×( 1/2 + 2/3 )

13.8 × 4/5 + 8 × 11/5

14.31 × 5/6 – 5/6

15.9/7 - ( 2/7 – 10/21 )

16.5/9 × 18 – 14 × 2/7

17.4/5 × 25/16 + 2/3 × 3/4

18.14 × 8/7 – 5/6 × 12/15

19.17/32 – 3/4 × 9/24

20.3 × 2/9 + 1/3

21.5/7 × 3/25 + 3/7

22.3/14 ×× 2/3 + 1/6

23.1/5 × 2/3 + 5/6

24.9/22 + 1/11 ÷ 1/2

25.5/3 × 11/5 + 4/3

26.45 × 2/3 + 1/3 × 15

27.7/19 + 12/19 × 5/6

28.1/4 + 3/4 ÷ 2/3

29.8/7 × 21/16 + 1/2

30.101 × 1/5 – 1/5 × 21

31.50+160÷40 (58+370)÷(64-45)

32.120-144÷18+35

33.347+45×2-4160÷52

34(58+37)÷(64-9×5)

35.95÷(64-45)

36.178-145÷5×6+42 420+580-64×21÷28

37.812-700÷(9+31×11) (136+64)×(65-345÷23)

38.85+14×(14+208÷26)

39.(284+16)×(512-8208÷18)

40.120-36×4÷18+35

41.(58+37)÷(64-9×5)

42.(6.8-6.8×0.55)÷8.5

43.0.12× 4.8÷0.12×4.8

44.(3.2×1.5+2.5)÷1.6 (2)3.2×(1.5+2.5)÷1.6

45.6-1.6÷4= 5.38+7.85-5.37=

46.7.2÷0.8-1.2×5= 6-1.19×3-0.43=

47.6.5×(4.8-1.2×4)= 0.68×1.9+0.32×1.9

48.10.15-10.75×0.4-5.7

49.5.8×(3.87-0.13)+4.2×3.74

50.32.52-(6+9.728÷3.2)×2.5

这上面有

30.8÷[14-(9.85+1.07)]

[60-(9.5+28.9)]÷0.18

2.881÷0.43-0.24×3.5

20×[(2.44-1.8)÷0.4+0.15]

28-(3.4+1.25×2.4)

2.55×7.1+2.45×7.1

777×9+1111×3

0.8×[15.5-(3.21+5.79)]

(31.8+3.2×4)÷5

31.5×4÷(6+3)

0.64×25×7.8+2.2

2÷2.5+2.5÷2

194-64.8÷1.8×0.9

36.72÷4.25×9.9

5180-705×6

24÷2.4-2.5×0.8

(4121+2389)÷7

671×15-974

0.8×[7.9-(2+5)]

469×12+1492

405×(3213-3189)

3.416÷(0.016×35)

0.8×[(10-6.76)÷1.2]

数学七下问题!紧急!

1.若2x+3y-4=0,求9的x次方×27的y次方=3的2x次方×3的3y次方=3的(2x+3y)次方=3^4=81

2.4(b-a)(a+b)-(2a-3b)(3a-2b)=b^2-a^2-(6a^2-13ab+6^2)=5a^2+13ab-7b^2

3.(a的5次方b的2次方-4a的2次方b的5次方-ab的6次方)÷ab的2次方-(a的2次方+b的2次方)(a的2次方-b的2次方)=(a的4次方-4a的1次方b的3次方-b的4次方)-(a的4次方-b的4次方)=-4a的1次方b的3次方=-4*2*(-1/2)^3=1

4.(2a-b)的2次方+b(2a+b)-4a的2次方÷b=(-2ab+2b^2)/b=-2a+2b

5.3x的2次方*(-x的2次方)的3次方+2x的2次方*x的9次方÷x的3次方=-3x^4+2x^11/x^3=-3x^4+2x^8

6.(2a+1+b)(2a-1+b)=(2a+b+1)(2a+b-1)=(2a+b)^2-1=4a^2+4ab+b^2-1

7.2008*2010-2009的2次方=(2009-1)(2009+1)-2009^2=2009^2-1-2009^2=-1 1.2x+3y=4

9=3^2

27=3^3

9^x27^y=3^2x3^3y=3^2x+3y=3^4=81

2.4b^2-4a^2-(6a^2-13ab-6b^2)=4b^2-4a^2-6a^2+13ab+6b^2=10b^2-10a^2+13ab

3.(a^4-4ab^4-b^4)-(a^4-b^4)=-4ab^4我不知道为什么不给b的值,还是我把题理解错了

4.没看懂

5.-3x^8+2x^11÷x^3=-3x^8+2x^8=-x^8

6.4a^2+4ab+b^2-1

7.(2009-1)(2009+1)-2009^2=2009^2-1-2009^2=-1

七下数学计算题400道及答案人教版

1) 66x+17y=3967

25x+y=1200

答案:x=48 y=47

(2) 18x+23y=2303

74x-y=1998

答案:x=27 y=79

(3) 44x+90y=7796

44x+y=3476

答案:x=79 y=48

(4) 76x-66y=4082

30x-y=2940

答案:x=98 y=51

(5) 67x+54y=8546

71x-y=5680

答案:x=80 y=59

(6) 42x-95y=-1410

21x-y=1575

答案:x=75 y=48

(7) 47x-40y=853

34x-y=2006

答案:x=59 y=48

(8) 19x-32y=-1786

75x+y=4950

答案:x=66 y=95

(9) 97x+24y=7202

58x-y=2900

答案:x=50 y=98

(10) 42x+85y=6362

63x-y=1638

答案:x=26 y=62

(11) 85x-92y=-2518

27x-y=486

答案:x=18 y=44

(12) 79x+40y=2419

56x-y=1176

答案:x=21 y=19

(13) 80x-87y=2156

22x-y=880

答案:x=40 y=12

(14) 32x+62y=5134

57x+y=2850

答案:x=50 y=57

(15) 83x-49y=82

59x+y=2183

答案:x=37 y=61

(16) 91x+70y=5845

95x-y=4275

答案:x=45 y=25

(17) 29x+44y=5281

88x-y=3608

答案:x=41 y=93

(18) 25x-95y=-4355

40x-y=2000

答案:x=50 y=59

(19) 54x+68y=3284

78x+y=1404

答案:x=18 y=34

(20) 70x+13y=3520

52x+y=2132

答案:x=41 y=50

七下数学计算题400道及答案过程

1) 66x+17y=3967

25x+y=1200

答案:x=48 y=47

(2) 18x+23y=2303

74x-y=1998

答案:x=27 y=79

(3) 44x+90y=7796

44x+y=3476

答案:x=79 y=48

(4) 76x-66y=4082

30x-y=2940

答案:x=98 y=51

(5) 67x+54y=8546

71x-y=5680

答案:x=80 y=59

(6) 42x-95y=-1410

21x-y=1575

答案:x=75 y=48

(7) 47x-40y=853

34x-y=2006

答案:x=59 y=48

(8) 19x-32y=-1786

75x+y=4950

答案:x=66 y=95

(9) 97x+24y=7202

58x-y=2900

答案:x=50 y=98

(10) 42x+85y=6362

63x-y=1638

答案:x=26 y=62

(11) 85x-92y=-2518

27x-y=486

答案:x=18 y=44

(12) 79x+40y=2419

56x-y=1176

答案:x=21 y=19

(13) 80x-87y=2156

22x-y=880

答案:x=40 y=12

(14) 32x+62y=5134

57x+y=2850

答案:x=50 y=57

(15) 83x-49y=82

59x+y=2183

答案:x=37 y=61

(16) 91x+70y=5845

95x-y=4275

答案:x=45 y=25

(17) 29x+44y=5281

88x-y=3608

答案:x=41 y=93

(18) 25x-95y=-4355

40x-y=2000

答案:x=50 y=59

(19) 54x+68y=3284

78x+y=1404

答案:x=18 y=34

(20) 70x+13y=3520

52x+y=2132

答案:x=41 y=50

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七年级下册数学计算题100道

1.3/7 × 49/9 - 4/3

2.8/9 × 15/36 + 1/27

3.12× 5/6 – 2/9 ×3

4.8× 5/4 + 1/4

5.6÷ 3/8 – 3/8 ÷6

6.4/7 × 5/9 + 3/7 × 5/9

7.5/2 -( 3/2 + 4/5 )

8.7/8 + ( 1/8 + 1/9 )

9.9 × 5/6 + 5/6

10.3/4 × 8/9 - 1/3

0.12χ+1.8×0.9=7.2 (9-5χ)×0.3=1.02 6.4χ-χ=28+4.4

11.7 × 5/49 + 3/14

12.6 ×( 1/2 + 2/3 )

13.8 × 4/5 + 8 × 11/5

14.31 × 5/6 – 5/6

15.9/7 - ( 2/7 – 10/21 )

16.5/9 × 18 – 14 × 2/7

17.4/5 × 25/16 + 2/3 × 3/4

18.14 × 8/7 – 5/6 × 12/15

19.17/32 – 3/4 × 9/24

20.3 × 2/9 + 1/3

21.5/7 × 3/25 + 3/7

22.3/14 ×× 2/3 + 1/6

23.1/5 × 2/3 + 5/6

24.9/22 + 1/11 ÷ 1/2

25.5/3 × 11/5 + 4/3

26.45 × 2/3 + 1/3 × 15

27.7/19 + 12/19 × 5/6

28.1/4 + 3/4 ÷ 2/3

29.8/7 × 21/16 + 1/2

30.101 × 1/5 – 1/5 × 21

31.50+160÷40 (58+370)÷(64-45)

32.120-144÷18+35

33.347+45×2-4160÷52

34(58+37)÷(64-9×5)

35.95÷(64-45)

36.178-145÷5×6+42 420+580-64×21÷28

37.812-700÷(9+31×11) (136+64)×(65-345÷23)

38.85+14×(14+208÷26)

39.(284+16)×(512-8208÷18)

40.120-36×4÷18+35

41.(58+37)÷(64-9×5)

42.(6.8-6.8×0.55)÷8.5

43.0.12× 4.8÷0.12×4.8

44.(3.2×1.5+2.5)÷1.6 (2)3.2×(1.5+2.5)÷1.6

45.6-1.6÷4= 5.38+7.85-5.37=

46.7.2÷0.8-1.2×5= 6-1.19×3-0.43=

47.6.5×(4.8-1.2×4)= 0.68×1.9+0.32×1.9

48.10.15-10.75×0.4-5.7

49.5.8×(3.87-0.13)+4.2×3.74

50.32.52-(6+9.728÷3.2)×2.5

这上面有

30.8÷[14-(9.85+1.07)]

[60-(9.5+28.9)]÷0.18

2.881÷0.43-0.24×3.5

20×[(2.44-1.8)÷0.4+0.15]

28-(3.4+1.25×2.4)

2.55×7.1+2.45×7.1

777×9+1111×3

0.8×[15.5-(3.21+5.79)]

(31.8+3.2×4)÷5

31.5×4÷(6+3)

0.64×25×7.8+2.2

2÷2.5+2.5÷2

194-64.8÷1.8×0.9

36.72÷4.25×9.9

5180-705×6

24÷2.4-2.5×0.8

(4121+2389)÷7

671×15-974

0.8×[7.9-(2+5)]

469×12+1492

405×(3213-3189)

3.416÷(0.016×35)

0.8×[(10-6.76)÷1.2]

数学七下问题!紧急!

1.若2x+3y-4=0,求9的x次方×27的y次方=3的2x次方×3的3y次方=3的(2x+3y)次方=3^4=81

2.4(b-a)(a+b)-(2a-3b)(3a-2b)=b^2-a^2-(6a^2-13ab+6^2)=5a^2+13ab-7b^2

3.(a的5次方b的2次方-4a的2次方b的5次方-ab的6次方)÷ab的2次方-(a的2次方+b的2次方)(a的2次方-b的2次方)=(a的4次方-4a的1次方b的3次方-b的4次方)-(a的4次方-b的4次方)=-4a的1次方b的3次方=-4*2*(-1/2)^3=1

4.(2a-b)的2次方+b(2a+b)-4a的2次方÷b=(-2ab+2b^2)/b=-2a+2b

5.3x的2次方*(-x的2次方)的3次方+2x的2次方*x的9次方÷x的3次方=-3x^4+2x^11/x^3=-3x^4+2x^8

6.(2a+1+b)(2a-1+b)=(2a+b+1)(2a+b-1)=(2a+b)^2-1=4a^2+4ab+b^2-1

7.2008*2010-2009的2次方=(2009-1)(2009+1)-2009^2=2009^2-1-2009^2=-1 1.2x+3y=4

9=3^2

27=3^3

9^x27^y=3^2x3^3y=3^2x+3y=3^4=81

2.4b^2-4a^2-(6a^2-13ab-6b^2)=4b^2-4a^2-6a^2+13ab+6b^2=10b^2-10a^2+13ab

3.(a^4-4ab^4-b^4)-(a^4-b^4)=-4ab^4我不知道为什么不给b的值,还是我把题理解错了

4.没看懂

5.-3x^8+2x^11÷x^3=-3x^8+2x^8=-x^8

6.4a^2+4ab+b^2-1

7.(2009-1)(2009+1)-2009^2=2009^2-1-2009^2=-1

七下数学计算题400道及答案人教版

1) 66x+17y=3967

25x+y=1200

答案:x=48 y=47

(2) 18x+23y=2303

74x-y=1998

答案:x=27 y=79

(3) 44x+90y=7796

44x+y=3476

答案:x=79 y=48

(4) 76x-66y=4082

30x-y=2940

答案:x=98 y=51

(5) 67x+54y=8546

71x-y=5680

答案:x=80 y=59

(6) 42x-95y=-1410

21x-y=1575

答案:x=75 y=48

(7) 47x-40y=853

34x-y=2006

答案:x=59 y=48

(8) 19x-32y=-1786

75x+y=4950

答案:x=66 y=95

(9) 97x+24y=7202

58x-y=2900

答案:x=50 y=98

(10) 42x+85y=6362

63x-y=1638

答案:x=26 y=62

(11) 85x-92y=-2518

27x-y=486

答案:x=18 y=44

(12) 79x+40y=2419

56x-y=1176

答案:x=21 y=19

(13) 80x-87y=2156

22x-y=880

答案:x=40 y=12

(14) 32x+62y=5134

57x+y=2850

答案:x=50 y=57

(15) 83x-49y=82

59x+y=2183

答案:x=37 y=61

(16) 91x+70y=5845

95x-y=4275

答案:x=45 y=25

(17) 29x+44y=5281

88x-y=3608

答案:x=41 y=93

(18) 25x-95y=-4355

40x-y=2000

答案:x=50 y=59

(19) 54x+68y=3284

78x+y=1404

答案:x=18 y=34

(20) 70x+13y=3520

52x+y=2132

答案:x=41 y=50

七下数学计算题400道及答案过程

1) 66x+17y=3967

25x+y=1200

答案:x=48 y=47

(2) 18x+23y=2303

74x-y=1998

答案:x=27 y=79

(3) 44x+90y=7796

44x+y=3476

答案:x=79 y=48

(4) 76x-66y=4082

30x-y=2940

答案:x=98 y=51

(5) 67x+54y=8546

71x-y=5680

答案:x=80 y=59

(6) 42x-95y=-1410

21x-y=1575

答案:x=75 y=48

(7) 47x-40y=853

34x-y=2006

答案:x=59 y=48

(8) 19x-32y=-1786

75x+y=4950

答案:x=66 y=95

(9) 97x+24y=7202

58x-y=2900

答案:x=50 y=98

(10) 42x+85y=6362

63x-y=1638

答案:x=26 y=62

(11) 85x-92y=-2518

27x-y=486

答案:x=18 y=44

(12) 79x+40y=2419

56x-y=1176

答案:x=21 y=19

(13) 80x-87y=2156

22x-y=880

答案:x=40 y=12

(14) 32x+62y=5134

57x+y=2850

答案:x=50 y=57

(15) 83x-49y=82

59x+y=2183

答案:x=37 y=61

(16) 91x+70y=5845

95x-y=4275

答案:x=45 y=25

(17) 29x+44y=5281

88x-y=3608

答案:x=41 y=93

(18) 25x-95y=-4355

40x-y=2000

答案:x=50 y=59

(19) 54x+68y=3284

78x+y=1404

答案:x=18 y=34

(20) 70x+13y=3520

52x+y=2132

答案:x=41 y=50

七下数学计算题400道(七下数学计算题400道及答案人教版)