初一数学计算题及答案.docx

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初一数学计算题及答案.docx

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初一数学计算题及答案.docx

初一数学计算题及答案

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)+76×6460-+]÷÷-×20×[-÷+]28-××〔〕(×4)÷5194-÷×÷×÷(×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+42420+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+42420+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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