(完整版)初一100道数学计算题及答案

(完整版)初一100道数学计算题及答案

1.25×（810）

=1.25×81.25×10

=1012.5=22.5

9123-（1238.8）

=9123-123-8.8

=9000-8.8

=8991.2

1.24×8.38.3×1.76

=8.3×（1.241.76)

=8.3×3=24.9

9999×1001

=9999×（10001）

=9999×10009999×1

=10008999

14.8×6.3-6.3×6.5＋8.3×3.7

=（14.8-6.5）×6.3＋8.3×3.7

=8.3×6.38.3×3.7

8.3×（6.3＋3.7）

=8.3×10

=83

1.240.788.76

=（1.248.76）0.78

=100.78

=10.78

933-157-43

=933-（15743）

=933-200

=733

4821-998

=4821-10002

=3823

I32×125×25

=4×8×125×25

=（4×25）×（8×125）

=100×1000

=100000

9048÷268

=（2600260026001248）÷26

=2600÷262600÷262600÷261248÷269

=10010010048

=348

2881÷43

=（12901591）÷434

=1290÷431591÷43

=3037

3.2×42.3×3.75-12.5×0.423×16

=3.2×42.3×3.75-1.25×42.3×1.6

=42.3×(3.2×3.75-1.25×1.6)

=42.3×(4×0.8×3.75-1.25×4×0.4)

=42.3×(4×0.4×2×3.75-1.25×4×0.4)

=42.3×(4x0.4x7.5-1.25x4x0.4)

=42.3×[4×0.4×(7.5-1.25)]

=42.3×[4×0.4×6.25]

=42.3×(4×2.5)

=4237

1.818÷1.5-0.5×0.3

=1.812-0.15

=13.8-0.15

=13.65

6.5×83.5×8-47

=5228-47

=80-47

(80-9.8)×5分之2-1.32

=70.2X2/5-1.32

=28.08-1.32

=26.76

8×7分之4÷[1÷(3.2-2.95)]

=8×4/7÷[1÷0.25]

=8×4/7÷4

=8/7

2700×（506－499）÷900

=2700×7÷900

=18900÷900

=21

33.02－（148.4－90.85）÷2.5

=33.02－57.55÷2.5

=33.02－23.02

=10

（1÷1－1）÷5.1

=（1－1）÷5.1

=0÷5.1

=0

18.1＋（3－0.299÷0.23）×1

=18.1＋1.7×1

=18.1＋1.7

=19.8

[-18]29[-52]60=19

[-3][-2][-1]012=-3

[-301]125301[-75]=50

[-1][-1/2]3/4[-1/4]=-1

[-7/2]5/6[-0.5]4/519/6=1.25

[-26.54][-6.14]18.546.14=-8

1.125[-17/5][-1/8][-0.6]=-3

[-9876(-87)]*23[56(-75)-(7)]-(843)

521*8/2-6-59

68/21-8-11*861

-2/9-7/9-56

4.6-(-3/41.6-4-3/4)

1/235/6-7/12

[2/3-4-1/4*(-0.4)]/1/32

22(-4)(-2)4*3

-2*8-8*1/28/1/8

(2/31/2)/(-1/12)*(-12)

(-28)/(-64)(-1)

2/(-2)0/7-(-8)*(-2)

(1/4-5/61/32/3)/1/2

18-6/(-3)*(-2)

(53/8*8/30/(-2)-3

(-84)/2*(-3)/(-6)

1/2*(-4/15)/2/3

-3x2y-5x-7y

1437×27＋27×563〔75-（1218）〕÷15

2160÷〔（83-79）×18〕280＋840÷24×5

325÷13×(266－250)85×(95－1440÷24)

58870÷(105＋20×2)1437×27＋27×563

81432÷(13×52＋78)[37.85-（7.856.4）]×30

156×[(17.7-7.2)÷3]（947－599）＋76×64

36×(913－276÷23)[192－（54＋38）]×67

[（7.1-5.6）×0.9-1.15]÷2.581432÷(13×52＋78)

5.4÷[2.6×（3.7-2.9）0.62]（947－599）＋76×6460－(9.5＋28.9)]÷0.182.881÷0.43－0.24×3.520×[(2.44－1.8)÷0.4＋0.15]28-(3.41.25×2.4)0.8×〔15.5-(3.215.79)〕（31.83.2×4）÷5194－64.8÷1.8×0.936.72÷4.25×9.93.416÷（0.016×35）0.8×[(10－6.76)÷1.2]

（13664）×（65-345÷23）(6.8-6.8×0.55)÷8.5

0.12×4.8÷0.12×4.8（5837）÷（64-9×5）

812-700÷（931×11）（3.2×1.52.5）÷1.6

8514×（14208÷26）120-36×4÷1835

（28416）×（512-8208÷18）9.72×1.6-18.305÷7

4/7÷[1/3×（3/5-3/10）]（4/51/4）÷7/37/10

12.78－0÷（13.4＋156.6）37.812-700÷（931×11）（13664）×（65-345÷23）3.2×（1.52.5）÷1.6

8514×（14208÷26）（5837）÷（64-9×5）

(6.8-6.8×0.55)÷8.5（28416）×（512-8208÷18）

0.12×4.8÷0.12×4.8（3.2×1.52.5）÷1.6

120-36×4÷183510.15-10.75×0.4-5.7

5.8×（3.87-0.13）4.2×3.7434745×2-4160÷52

32.52-（69.728÷3.2）×2.587（5837）÷（64-9×5）

[（7.1-5.6）×0.9-1.15]÷2.5（3.2×1.52.5）÷1.6

5.4÷[2.6×（3.7-2.9）0.62]12×6÷（12-7.2）-6

3.2×6（1.52.5）÷1.6（3.2×1.52.5）÷1.6

5.8×（3.87-0.13）4.2×3.74

33.02－（148.4－90.85）÷2.5

1)23(-73)

(2)(-84)(-49)

(3)7(-2.04)

(4)4.23(-7.57)

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

(6)9/4(-3/2)

(7)3.75(2.25)5/4

(8)-3.75(5/4)(-1.5)

(9)(-17/4)(-10/3)(13/3)(11/3)

(10)(-1.8)(0.2)(-1.7)(0.1)(1.8)(1.4)

(11)(1.3)-(17/7)

(12)(-2)-(2/3)

(13)|(-7.2)-(-6.3)(1.1)|

(14)|(-5/4)-(-3/4)|-|1-5/4-|-3/4|)

(15)(-2/199)*(-7/6-3/28/3)

(16)4a)*(-3b)*(5c)*1/6

1.3/7×49/9-4/3

2.8/9×15/361/27

3.12×5/6–2/9×3

4.8×5/41/4

5.6÷3/8–3/8÷6

6.4/7×5/93/7×5/9

7.5/2-（3/24/5）

8.7/8（1/81/9）

9.9×5/65/6

10.3/4×8/9-1/3

0.12χ＋1.8×0.9=7.2(9－5χ)×0.3=1.026.4χ-χ=284.4

11.7×5/493/14

12.6×（1/22/3）

13.8×4/58×11/5

14.31×5/6–5/6

15.9/7-（2/7–10/21）

16.5/9×18–14×2/7

17.4/5×25/162/3×3/4

18.14×8/7–5/6×12/15

19.17/32–3/4×9/24

20.3×2/91/3

21.5/7×3/253/7

22.3/14××2/31/6

23.1/5×2/35/6

24.9/221/11÷1/2

25.5/3×11/54/3

26.45×2/31/3×15

27.7/1912/19×5/6

28.1/43/4÷2/3

29.8/7×21/161/2

30.101×1/5–1/5×21

31.50＋160÷40（58370）÷（64-45）

32.120-144÷1835

33.34745×2-4160÷52

34（5837）÷（64-9×5）

35.95÷（64-45）

36.178-145÷5×642420580-64×21÷28

37.812-700÷（931×11）（13664）×（65-345÷23）

38.8514×（14208÷26）

39.（28416）×（512-8208÷18）

40.120-36×4÷1835

41.（5837）÷（64-9×5）

42.(6.8-6.8×0.55)÷8.5

43.0.12×4.8÷0.12×4.8

44.（3.2×1.52.5）÷1.6（2）3.2×（1.52.5）÷1.6

45.6-1.6÷4=5.387.85-5.37=

46.7.2÷0.8-1.2×5=6-1.19×3-0.43=

47.6.5×（4.8-1.2×4）=0.68×1.90.32×1.9

48.10.15-10.75×0.4-5.7

49.5.8×（3.87-0.13）4.2×3.74

50.32.52-（69.728÷3.2）×2.5

51.-558139078-(-56)50

52.-7*2-57/(3

53.(-7)*2/(1/3)79/(36/4）

54.12345678998/(-4)

55.369/33-(-54-31/15.5)

56.39{3x[42/2x(3x8)]}

57.9x8x7/5x(46)

58.11x22/(412/2)

59.94(-60)/10

1.

a^3-2b^3ab(2a-b)

=a^32a^2b-2b^3-ab^2

=a^2(a2b)-b^2(2ba)

=(a2b)(a^2-b^2)

=(a2b)(ab)(a-b)

2.

(x^2y^2)^2-4y(x^2y^2)4y^2

=(x^2y^2-2y)^2

3.

(x^22x)^23(x^22x)x^22x3

=(x^22x)^24(x^22x)3

=(x^22x3)(x^22x1)

=(x^22x3)(x1)^2

4.

(a1)(a2)(2a1)(a-2)-12

=a^23a22a^2-3a-2-12

=3a^2-12

=3(a2)(a-2)

5.

x^2(yz)^2-2xy(x-z)(yz)y^2(x-z)^2

=[x(yz)-y(x-z)]^2

=(xzyz)^2

=z^2(xy)^2

6.

3(a2)^228(a2)-20

=[3(a2)-2][(a2)10]

=(3a4)(a12)

7.

(ab)^2-(b-c)^2a^2-c^2

=(ab)^2-c^2a^2-(b-c)^2

=(abc)(ab-c)(ab-c)(a-bc)

=(ab-c)(abca-bc)

=2(ab-c)(ac)

8.

x(x1)(x^2x-1)-2

=(x^2x)(x^2x-1)-2

=(x^2x)^2-(x^2x)-2

=(x^2x-2)(x^2x1)

=(x2)(x-1)(x^2x1)

1.3/7×49/9-4/3

2.8/9×15/361/27

3.12×5/6–2/9×3

4.8×5/41/4

5.6÷3/8–3/8÷6

6.4/7×5/93/7×5/9

7.5/2-（3/24/5）

8.7/8（1/81/9）

9.9×5/65/6

10.3/4×8/9-1/3

0.12χ＋1.8×0.9=7.2(9－5χ)×0.3=1.026.4χ-χ=284.4

11.7×5/493/14

12.6×（1/22/3）

13.8×4/58×11/5

14.31×5/6–5/6

15.9/7-（2/7–10/21）

16.5/9×18–14×2/7

17.4/5×25/162/3×3/4

18.14×8/7–5/6×12/15

19.17/32–3/4×9/24

20.3×2/91/3

21.5/7×3/253/7

22.3/14××2/31/6

23.1/5×2/35/6

24.9/221/11÷1/2

25.5/3×11/54/3

26.45×2/31/3×15

27.7/1912/19×5/6

28.1/43/4÷2/3

29.8/7×21/161/2

30.101×1/5–1/5×21

31.50＋160÷40（58370）÷（64-45）

32.120-144÷1835

33.34745×2-4160÷52

34（5837）÷（64-9×5）

35.95÷（64-45）

36.178-145÷5×642420580-64×21÷28

37.812-700÷（931×11）（13664）×（65-345÷23）

38.8514×（14208÷26）

39.（28416）×（512-8208÷18）

40.120-36×4÷1835

41.（5837）÷（64-9×5）

42.(6.8-6.8×0.55)÷8.5

43.0.12×4.8÷0.12×4.8

44.（3.2×1.52.5）÷1.6（2）3.2×（1.52.5）÷1.6

45.6-1.6÷4=5.387.85-5.37=

46.7.2÷0.8-1.2×5=6-1.19×3-0.43=

47.6.5×（4.8-1.2×4）=0.68×1.90.32×1.9

48.10.15-10.75×0.4-5.7

49.5.8×（3.87-0.13）4.2×3.74

50.32.52-（69.728÷3.2）×2.5

51.-558139078-(-56)50

52.-7*2-57/(3

53.(-7)*2/(1/3)79/(36/4）

54.12345678998/(-4)

55.369/33-(-54-31/15.5)

56.39{3x[42/2x(3x8)