七年级有理数四则混合运算题九十道有答案的.docx
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七年级有理数四则混合运算题九十道有答案的.docx
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七年级有理数四则混合运算题九十道有答案的
七年级有理数四则混合运算题九十道(有答案的)
39+[-23]+0+[-16]=0[-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+[-0.5]+4/5+19/6=1.25[-26.54]+[-6.14]+18.54+6.14=-81.125+[-17/5]+[-1/8]+[-0.6]=-3[-|98|+76+(-87)]*23[56+(-75)-(7)]-(8+4+3)5+21*8/2-6-5968/21-8-11*8+61-2/9-7/9-564.6-(-3/4+1.6-4-3/4)1/2+3+5/6-7/12[2/3-4-1/4*(-0.4)]/1/3+222+(-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
有理数的加减混合运算
回答者:
370116-翰林文圣十八级1-2210:
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更多关于300道简单的有理数运算的问题>>查看同主题问题:
有理数的混合运算
其他回答共1条
1.计算题
(1)3.28-4.76+1-;
(2)2.75-2-3+1;
(3)42+(-1)-1-(-0.125);
(4)(-48)+82-(-25)+(-6)2;
(5)-+()X(-2.4).
2.计算题:
(10‘X5=50')
(1)-23+1X(-1)2+
(1)2;
(2)-14-(2-0.5)XX[()2-()3];
(3)-1X[1-3X(-)2]-()2X(-2)3+(-)3
(4)(0.12+0.32)+[-22+(-3)2-3X];
(5)-6.243X2+31.2X(-2)3+(-0.51)624X.
[-|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
4.6-(-3/4+1.6-4-3/4)
1/2+3+5/6-7/12
[2/3-4-1/4*(-0.4)]/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)/1/218-6/(-3)*(-2)(5+3/8*8/30/(-2)-3(-84)/2*(-3)/(-6)1/2*(-4/15)/2/3-3x+2y-5x-7y
75+〔138+(100-54)〕85X(95-1440-24)
80400-(4300+870+15)240X78+(154-115)
1437X27+27X563〔75-(12+18)〕+15
2160+〔(83-79)X18〕280+840+24X5
325+13X(266-250)85X(95-1440+24)58870+(105+20X2)1437X27+27X56381432+(13X52+78)[37.85-(7.85+6.4)]X30156X[(17.7-7.2)+3](947-599)+76X64
36X(913-276+23)[192-(54+38)]X67[(7.1-5.6)X0.9-1.15]+2.581432+(13X52+78)5.4+[2.6X(3.7-2.9)+0.62](947-599)+76X6460-(9.5+28.9)]+0.182.881+0.43-0.24X3.520X[(2.44-1.8)+0.4+0.15]28-(3.41.25X2.4)0.8X〔15.5-(3.215.79)〕(31.83.2
X4)+5194-64.8+1.8X0.936.72+4.25X9.93.416+
(0.016X35)0.8X[(10—6.76)+1.2]
(136+64)X(65-345+23)(6.8-6.8X0.55)+8.5
0.12X4.8+0.12X4.8(58+37)+(64-9X5)
812-700+(9+31X11)(3.2X1.5+2.5)+1.6
85+14X(14+208+26)120-36X4+18+35
(284+16)X(512-8208+18)9.72X1.6-18.305+74/7+[1/3X(3/5-3/10)](4/5+1/4)+7/3+7/10
12.78—0+(13.4+156.6)37.812-700+(9+31X11)
(136+64)X(65-345+23)3.2X(1.5+2.5)+1.685+14X(14+208+26)(58+37)+(64-9X5)
(6.8-6.8X0.55)+8.5(284+16)X(512-8208+18)
0.12X4.8+0.12X4.8(3.2X1.5+2.5)+1.6
120-36X4+18+3510.15-10.750.X4-5.75.8X(3.87-0.13)+4.2X3.74347+45X2-4160+5232.52-(6+9.728+3.2)X2.587(58+37)+(64-9X5)[(7.1-5.6)X0.9-1.15]+2.5(3.2X1.5+2.5)+1.6
5.4+[2.6X(3.7-2.9)+0.62]12X6+(12-7.2)-63.2X6+(1.5+2.5)+1.6(3.2X1.5+2.5)+1.6
5.8X(3.87-0.13)+4.2X3.7433.02—(148.4—90.85)+2.5
(一)计算题:
(1)23+(-73)
(2)(-84)+(-49)
(3)7+(-2.04)
(4)4.23+(-7.57)
(5)(-7/3)+(-7/6)
(6)9/4+(-3/2)
(7)3.75+(2.25)+5/4
(8)-3.75+(+5/4)+(-1.5)
(9)(-17/4)+(-10/3)+(+13/3)+(11/3)
(10)(-1.8)+(+0.2)+(-1.7)+(0.1)+(+1.8)+(+1.4)
(11)(+1.3)-(+17/7)
(12)(-2)-(+2/3)
(13)|(-7.2)-(-6.3)+(1.1)|
(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
1.3/749/9-4/3
2.8/9W/36+1/27
3.12S/6-2/93X
4.85/4+1/4
5.6超8-3/86^
6.4/75/9+3/75/9
7.5/2-(3/2+4/5)
8.7/8+(1/8+1/9)
9.95/6+5/6
10.3/48/9-1/3
0.12x+1.8/0.9=7.2(9-5x)X0.3=1.026.4x-X=28+4.4
11.75//49+3/14
12.6/(1/2+2/3)
13.84//5+81/1/5
14.31X6-5/6
15.9/7-(2/7-10/21)
16.5/91/8-14/2/7
17.4/52/5/16+2/33/4/
18.148//7-5/61/2/15
19.17/32-3/49//24
20.32//9+1/3
21.5/73//25+3/7
22.3/14//2/3+1/6
23.1/52//3+5/6
24.9/22+1/111/2-
25.5/31/1/5+4/3
26.452//3+1/315/
27.7/19+12/195/6/
28.1/4+3/42/3-
29.8/72t/16+1/2
30.1011/5-1/521
31.50+160+40(58+370)-(64-45)
32.120-144偲+35
33.347+452-416052
34(58+37)5(64-925)
35.955(64-45)
36.178-145556+42420+580-6421528
37.812-7005(9+31211)(136+64)2(65-345523)
38.85+142(14+208526)
39.(284+16)2(512-8208518)
40.120-364518+35
41.(58+37)5(64-925)
42.(6.8-6.80.525)58.5
43.0.1224.805.1224.8
44.(3.221.5+2.5)51.6
(2)3.22(1.5+2.5)51.6
45.6-1.645=5.38+7.85-5.37=
46.7.205.8-1.252=6-1.1932-0.43=
47.6.52(4.8-1.224)=0.6821.9+0.3221.9
48.10.15-10.750.24-5.7
49.5.82(3.87-0.13)+4.223.74
50.32.52-(6+9.72853.2)22.5
51.-5+58+13+90+78-(-56)+50
52.-7*2-57/(3
53.(-7)*2/(1/3)+79/(3+6/4)
54.123+456+789+98/(-4)
55.369/33-(-54-31/15.5)
56.39+{3x[42/2x(3x8)]}
57.9x8x7/5x(4+6)
58.11x22/(4+12/2)
59.94+(-60)/10
1.
aT-2bT+ab(2a-b)
=aA3+2aA2b-2bT-abA2
=aA2(a+2b)-bA2(2b+a)
=(a+2b)(aA2-bA2)=(a+2b)(a+b)(a-b)
2.(xA2+yA2)A2-4y(xA2+yA2)+4yA2=(xA2+yA2-2y)A2
3.(xA2+2x)A2+3(xA2+2x)+xA2+2x+3=(xA2+2x)A2+4(xA2+2x)+3=(xA2+2x+3)(xA2+2x+1)
=(xA2+2x+3)(x+1)A2
4.
(a+1)(a+2)+(2a+1)(a-2)-12=aA2+3a+2+2aA2-3a-2-12
=3aA2-12
=3(a+2)(a-2)
5.
xA2(y+z)A2-2xy(x-z)(y+z)+yA2(x-z)A2
=[x(y+z)-y(x-z)]A2
=(xz+yz)A2
=zA2(x+y)A2
6.
3(a+2)A2+28(a+2)-20
=[3(a+2)-2][(a+2)+10]
=(3a+4)(a+12)
7.
(a+b)A2-(b-c)A2+aA2-cA2
=(a+b)A2-cA2+aA2-(b-c)A2
=(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)
x(x+1)(xT+x-1)-2=(xA2+x)(xA2+x-1)-2=(xA2+x)A2-(xA2+x)-2=(xA2+x-2)(xA2+x+1)=(x+2)(x-1)(xA2+x+1)
(尽力了!
)
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