初一数学计算题及答案

初一数学计算题及答案
初一数学计算题及答案

初一数学计算题及答案

初一数学计算题及答案 Pleasure Group Office【T985AB-B866SYT-B182C-BS682T-STT18】

初一数学计算题及答案×(8+10)

=×8+×10

=10+=

9123-(123+)

=

=

=

×+×

=×(+

=×3=

9999×1001

=9999×(1000+1)

=9999×1000+9999×1

×

=()×+×

=×+×

×(+)

=×10

=83

++

=(+)+

=10+

=

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

××

=××

=××

=×(4××

=×(4××2×

=×[4××

=×[4××]

=×(4×

=4237

+18÷

=+

=

=

×8+×8-47

=52+28-47

=80-47

×5分之

=

=

=

8×7分之4÷[1÷

=8×4/7÷[1÷]

=8×4/7÷4

=8/7

2700×(506-499)÷900 =2700×7÷900

=18900÷900

=21

-(-)÷

=-÷

=-

=10

(1÷1-1)÷

=(1-1)÷

=0÷

=0

+(3-÷)×1

=+×1

=+

=

[-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+[]+4/5+19/6=

[]+[]++= -8

+[-17/5]+[-1/8]+[]= -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

(-3/4+4)

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

[2/3-4-1/4*]/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) [(+)] ×30

156×[ (947-599)+76×64

36×(913-276÷23) [192-(54+38)]×67

[()× 81432÷(13×52+78)

÷[×()+] (947-599)+76×64 60-+]÷÷-× 20×[-÷+] 28- ××〔〕(×4)÷5 194-÷×÷×÷(×35)×[(10-÷]

(136+64)×(65-345÷23)

×÷×(58+37)÷(64-9×5)

812-700÷(9+31×11)(×+)÷

85+14×(14+208÷26) 120-36×4÷18+35

(284+16)×(512-8208÷18)×

4/7÷[1/3×(3/5-3/10)] (4/5+1/4)÷7/3+7/10

-0÷(+)÷(9+31×11)(136+64)×(65-345÷23)×(+)÷85+14×(14+208÷26)(58+37)÷(64-9×5)

(284+16)×(512-8208÷18)

×÷×(×+)÷

120-36×4÷18+35

×()+× 347+45×2-4160÷52

(6+÷)× 87(58+37)÷(64-9×5)[()×÷(×+)÷

÷[×()+] 12×6÷()-6

×6+(+)÷(×+)÷

×()+×

-(-)÷

1)23+(-73)

(2)(-84)+(-49)

(3)7+

(4)+

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

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

(7)++5/4

(8)+(+5/4)+

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

(10)+(++++(++(+

(11)(+-(+17/7)

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

(13)|-+|

(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

χ+×= (9-5χ)×= χ-χ=28+

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

+160÷40 (58+370)÷(64-45)

÷18+35

+45×2-4160÷52

34(58+37)÷(64-9×5)

÷(64-45)

÷5×6+42 420+580-64×21÷28

÷(9+31×11)(136+64)×(65-345÷23)+14×(14+208÷26)

39.(284+16)×(512-8208÷18)

×4÷18+35

41.(58+37)÷(64-9×5)

42.

×÷×

44.(×+)÷(2)×(+)÷ +

×=

()= ×+×

×

()+×

÷)×

+58+13+90+78-(-56)+50 *2-57/(3

53.(-7)*2/(1/3)+79/(3+6/4)+456+789+98/(-4)

33-(-54-31/

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

5x(4+6)

(4+12/2)

+(-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

χ+×= (9-5χ)×= χ-χ=28+

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

+160÷40 (58+370)÷(64-45)

÷18+35

+45×2-4160÷52

34(58+37)÷(64-9×5)

÷(64-45)

÷5×6+42 420+580-64×21÷28

÷(9+31×11)(136+64)×(65-345÷23)+14×(14+208÷26)

39.(284+16)×(512-8208÷18)

×4÷18+35

41.(58+37)÷(64-9×5)

42.

×÷×

44.(×+)÷(2)×(+)÷

+

×=

()= ×+×

×

()+×

÷)×

+58+13+90+78-(-56)+50

*2-57/(3

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

+456+789+98/(-4)

33-(-54-31/

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

5x(4+6)

(4+12/2)

+(-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)

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