初一数学计算题及答案文档格式.docx
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25?
=4×
8×
=(4×
25)×
(8×
125)
=100×
1000?
=100000
9048÷
268?
=(2600+2600+2600+1248)÷
26
=2600÷
26+2600÷
26+1248÷
269?
=100+100+100+48
=348
2881÷
43?
=(1290+1591)÷
434
=1290÷
43+1591÷
43
=30+37
(4×
2×
[4×
]?
=4237?
+18÷
=+
8-47?
=52+28-47
=80-47
5分之?
7分之4÷
[1÷
=8×
4/7÷
]
4
=8/7
2700×
(506-499)÷
900?
=2700×
7÷
=18900÷
=21?
-(-)÷
=-÷
=-?
=10
(1÷
1-1)÷
=(1-1)÷
=0÷
=0
+(3-÷
)×
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×
563?
81432÷
(13×
52+78)[(+)]×
30?
156×
[(947-599)+76×
64?
36×
(913-276÷
23)[192-(54+38)]×
67?
[()×
81432÷
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)×
[1/3×
(3/5-3/10)](4/5+1/4)÷
7/3+7/10?
-0÷
(+)÷
11)(136+64)×
23)×
(+)÷
26)(58+37)÷
(284+16)×
18)?
(×
120-36×
18+35
()+×
347+45×
2-4160÷
52?
(6+÷
87(58+37)÷
()+]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)?
+45×
34(58+37)÷
5×
6+42420+580-64×
21÷
28?
23)?
+14×
26)?
39.(284+16)×
41.(58+37)÷
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)?
=(x^2+x-2)(x^2+x+1)
=(x+2)(x-1)(x^2+x+1)