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
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)