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)