初一100道数学计算题及答案

发布时间:2020-12-05 02:51:11   来源:文档文库   
字号:

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

I32 ×125 ×25

=4 ×8×125 ×25

= 4 ×25 )×( 8 ×125

=100 ×1000

=100000

9048 ÷268

= 2600+2600+2600+1248

)÷26

=2600 ÷26+2600 ÷26+2600 ÷26+1248 ÷269

=100+100+100+48

=348

2881 ÷ 43

= 1290+1591 )÷ 434



=1290 ÷43+1591 ÷43



=30+37

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

1.8+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

(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 = 11)÷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]+0+1+2= -3



[-301]+125+301+[-75]= 50

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

[-7/2]+5/6+[-0.5]+4/5+19/6= 1.25

[-26.54]+[-6.14]+18.54+6.14= -8

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

[-98+76+(-87)]*23[56+(-75)-(7)]-(8+4+3)

5+21*8/2-6-59

68/21-8-11*8+61

-2/9-7/9-56

4.6-(-3/4+1.6-4-3/4)

1/2+3+5/6-7/12

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

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

-2*8-8*1/2+8/1/8

(2/3+1/2)/(-1/12)*(-12)

(-28)/(-6+4)+(-1)

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

(1/4-5/6+1/3+2/3)/1/2

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

(5+3/8*8/30/(-2)-3

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

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



-3x+2y-5x-7y

1437

×27 27 ×563 75- 12+18 )〕÷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- 7.85+6.4

] ×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] ÷2.5 81432 ÷(13 ×52 78)

5.4 ÷[2.6 ×( 3.7-2.9 +0.62] 947 599

)+ 76 ×64 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) 0.8 ×〔15.5-(3.21

5.79)

31.8 3.2 ×4)÷5 194 64.8 ÷1.8 ×0.9 36.72 ÷4.25 ×9.9 3.416 ÷(0.016 ×35 0.8 ×[(10

6.76) ÷1.2]

136+64 )×(65-345 ÷23 (6.8-6.8 ×0.55) ÷8.5

0.12 × 4.8 ÷0.12 ×4.8 58+37 )÷( 64-9 ×5

812-700 ÷(9+31 ×11 ) ( 3.2 ×1.5+2.5 )÷1.6

85+14 ×(14+208 ÷26120-36 ×4÷18+35

284+16 )×(512-8208 ÷18 9.72 ×1.6-18.305 ÷7

4/7 ÷[1/3 ×(3/5-3/10 ]

4/5+1/4 )÷7/3+7/10

12.78 0 ÷( 13.4 156.6

37.812-700 ÷(9+31 ×11 ) ( 136+64

)×(65-345

÷23

3.2 ×(1.5+2.5 )÷1.6



85+14 ×(14+208 ÷26 ) ( 58+37 )÷(64-9 ×5



(6.8-6.8 ×0.55) ÷8.5 284+16 )×(512-8208 ÷18

0.12 × 4.8 ÷0.12 ×4.8 3.2 ×1.5+2.5 )÷1.6

120-36 ×4 ÷18+35 10.15-10.75

×0.4-5.7

5.8

×(3.87-0.13

+4.2 ×3.74 347+45 ×2-4160 ÷52

32.52- 6+9.728

÷3.2

)×2.5 87 58+37 )÷(64-9 ×5

[ 7.1-5.6 )×0.9-1.15]

÷2.5

3.2 ×1.5+2.5 )÷1.6

5.4

÷[2.6 ×(3.7-2.9 +0.62] 12

×6÷(12-7.2 -6

3.2

×6+ 1.5+2.5

)÷1.6 3.2 ×1.5+2.5 )÷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)*(-7/6-3/2+8/3)

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

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

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

51.-5+58+13+90+78-(-56)+50

52.-7*2-57/(3

53.(-7)*2/(1/3)+79/(3+6/4

54.123+456+789+98/(-4)

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

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

57.9x8x7/5x(4+6)

58.11x22/(4+12/2)

59.94+(-60)/10

1.

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



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

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

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

=(a+2b)(a+b)(a-b)

2.

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

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

3.

(x^2+2x)^2+3(x^2+2x)+x^2+2x+3

=(x^2+2x)^2+4(x^2+2x)+3

=(x^2+2x+3)(x^2+2x+1)

=(x^2+2x+3)(x+1)^2

4.

(a+1)(a+2)+(2a+1)(a-2)-12

=a^2+3a+2+2a^2-3a-2-12

=3a^2-12

=3(a+2)(a-2)

5.

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

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

=(xz+yz)^2

=z^2(x+y)^2



6.

3(a+2)^2+28(a+2)-20

=[3(a+2)-2][(a+2)+10]

=(3a+4)(a+12)

7.

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

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

=(a+b+c)(a+b-c)+(a+b-c)(a-b+c)

=(a+b-c)(a+b+c+a-b+c)

=2(a+b-c)(a+c)

8.

x(x+1)(x^2+x-1)-2

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

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

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

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

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

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

51.-5+58+13+90+78-(-56)+50

52.-7*2-57/(3

53.(-7)*2/(1/3)+79/(3+6/4

54.123+456+789+98/(-4)

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

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

57.9x8x7/5x(4+6)

58.11x22/(4+12/2)

59.94+(-60)/10

1.

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

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

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

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

=(a+2b)(a+b)(a-b)

2.

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

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

3.

(x^2+2x)^2+3(x^2+2x)+x^2+2x+3

=(x^2+2x)^2+4(x^2+2x)+3



=(x^2+2x+3)(x^2+2x+1)

=(x^2+2x+3)(x+1)^2

4.

(a+1)(a+2)+(2a+1)(a-2)-12

=a^2+3a+2+2a^2-3a-2-12

=3a^2-12

=3(a+2)(a-2)

5.

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

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

=(xz+yz)^2

=z^2(x+y)^2

6.

3(a+2)^2+28(a+2)-20

=[3(a+2)-2][(a+2)+10]

=(3a+4)(a+12)

7.

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

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

=(a+b+c)(a+b-c)+(a+b-c)(a-b+c)

=(a+b-c)(a+b+c+a-b+c)

=2(a+b-c)(a+c)



8.

x(x+1)(x^2+x-1)-2

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

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

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

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

本文来源:https://www.2haoxitong.net/k/doc/a0ee579ddcccda38376baf1ffc4ffe473268fd9a.html

《初一100道数学计算题及答案.doc》
将本文的Word文档下载到电脑,方便收藏和打印
推荐度:
点击下载文档

文档为doc格式