用字母表示乘法分配律:(a+b)×c=______.

用字母表示乘法分配律:(a+b)×c=______.

用字母表示乘法分配律:(a+b)×c=ac+bc.故答案為:ac+bc.
與兩坐標軸正方向圍成面積為3平方組織的三角形且截距差為1的直線方程為
設直線與兩坐標軸的交點分別為A(a,0),B(0,b);a>0,b>0據題意有(1)ab=6(2)|a-b|=1當a-b=1時;(a+b)^2=(a-b)^2+4ab=25所以a+b=5;則a=3,b=2;同理a-b=-1時可得:a=2,b=3所以直線的方程為:x/3 +y/2=1或x/2+y…
求個方程就可以了,利用面積得方程:0.5*A*B=3,利用截距差得方程:A-B=1或者B-A=1,求出的A和B,得方程Y=AX+B,但要進行區分,其中B必須是正值,A須是負,且都不為0.
設方程為x/a+y/b=1
若a-b=1 ab/2=3 ab=6 => b²;+b-6=0 => b1=2 b2=-3(舍)=> a=3
若b-a=1得b=3 a=2
∴方程①x/3+y/2=1一般型2x+3y-6=0
②x/2+y/3=1一般型3x+2y-6=0為所求
七年級上有理數混合運算運算題帶答案(200道)
要200道,一定要帶答案.
只要混合運算計算題,不要應用題,生活實際運用,一定要
沒答案的我不需要(可以少於200道,150道左右也可以)
完事再給50分
(1)(-9)-(-13)+(-20)+(-2)
(2)3+13-(-7)/6
(3)(-2)-8-14-13
(4)(-7)*(-1)/7+8
(5)(-11)*4-(-18)/18
(6)4+(-11)-1/(-3)
(7)(-17)-6-16/(-18)
(8)5/7+(-1)-(-8)
(9)(-1)*(-1)+15+1
(10)3-(-5)*3/(-15)
(11)6*(-14)-(-14)+(-13)
(12)(-15)*(-13)-(-17)-(-4)
(13)(-20)/13/(-7)+11
(14)8+(-1)/7+(-4)
(15)(-13)-(-9)*16*(-12)
(16)(-1)+4*19+(-2)
(17)(-17)*(-9)-20+(-6)
(18)(-5)/12-(-16)*(-15)
(19)(-3)-13*(-5)*13
(20)5+(-7)+17-10
(21)(-10)-(-16)-13*(-16)
(22)(-14)+4-19-12
(23)5*13/14/(-10)
(24)3*1*17/(-10)
(25)6+(-12)+15-(-15)
(26)15/9/13+(-7)
(27)2/(-10)*1-(-8)
(28)11/(-19)+(-14)-5
(29)19-16+18/(-11)
(30)(-1)/19+(-5)+1
(31)(-5)+19/10*(-5)
(32)11/(-17)*(-13)*12
(33)(-8)+(-10)/8*17
(34)7-(-12)/(-1)+(-12)
(35)12+12-19+20
(36)(-13)*(-11)*20+(-4)
(37)17/(-2)-2*(-19)
(38)1-12*(-16)+(-9)
(39)13*(-14)-15/20
(40)(-15)*(-13)-6/(-9)
(41)15*(-1)/12+7
(42)(-13)+(-16)+(-14)-(-6)
(43)14*12*(-20)*(-13)
(44)17-9-20+(-10)
(45)12/(-14)+(-14)+(-2)
(46)(-15)-12/(-17)-(-3)
(47)6-3/9/(-8)
(48)(-20)*(-15)*10*(-4)
(49)7/(-2)*(-3)/(-14)
(50)13/2*18*(-7)
(51)13*5+6+3
(52)(-15)/5/3+(-20)
(53)19*4+17-4
(54)(-11)-(-6)*(-4)*(-9)
(55)(-16)+16-(-8)*(-13)
(56)16/(-1)/(-10)/(-20)
(57)(-1)-(-9)-9/(-19)
(58)13*20*(-13)*4
(59)11*(-6)-3+18
(60)(-20)+(-12)+(-1)+(-12)
(61)(-19)-3*(-13)*4
(62)(-13)/3-5*8
(63)(-15)/1+17*(-18)
(64)(-13)/3/19/8
(65)(-3)/(-13)/20*5
(66)3/12/(-18)-18
(67)5*(-19)/13+(-6)
(68)4+4*(-19)-11
(69)(-2)+17-5+(-1)
(70)9+(-3)*19*(-19)
(71)(-12)-(-6)+17/2
(72)15*(-5)-(-3)/5
(73)(-10)*2/(-1)/4
(74)(-8)*16/(-6)+4
(75)2-11+12+10
(76)(-3)+(-20)*(-7)*(-9)
(77)(-15)+8-17/7
(78)(-14)*10+18*2
(79)(-7)+2-(-17)*19
(80)(-7)/18/1+1
(81)11/(-9)-(-16)/17
(82)15+5*6-(-8)
(83)(-13)*(-18)+18/(-6)
(84)11-(-1)/11*(-6)
(85)(-4)+(-12)+19/6
(86)(-18)/(-1)/(-19)+2
(87)9*(-8)*(-6)/11
(88)20*(-3)*(-5)+1
(89)(-18)-2+(-11)/20
(90)15*1+4*17
(91)1-10+(-14)/(-1)
(92)10+(-4)*(-19)+(-12)
(93)15/14/5*7
(94)8+(-13)/3+1
(95)(-14)+6+(-2)*(-14)
(96)(-5)/(-13)/4+7
(97)(-15)/(-2)/(-12)+(-2)
(98)(-17)-(-20)-20*(-10)
(99)(-7)-10-13/3
(100)(-20)+(-18)+11+9
答案:
1 -18
2 103/6
3 -37
4 9
5 -43
6 -(20/3)
7 -(199/9)
8 54/7
9 17
10 2
11 -83
12 216
13 1021/91
14 27/7
15 -1741
16 73
17 127
18 -(2885/12)
19 842
20 5
21 214
22 -41
23 -(13/28)
24 -(51/10)
25 24
26 -(268/39)
27 39/5
28 -(372/19)
29 15/11
30 -(77/19)
31 -(29/2)
32 1716/17
33 -(117/4)
34 -17
35 25
36 2856
37 59/2
38 184
39 -(731/4)
40 587/3
41 23/4
42 -37
43 43680
44 -22
45 -(118/7)
46 -(192/17)
47 145/24
48 -12000
49 -(3/4)
50 -819
51 74
52 -21
53 89
54 205
55 -104
56 -(2/25)
57 161/19
58 -13520
59 -51
60 -45
61 137
62 -(133/3)
63 -321
64 -(13/456)
65 3/52
66 -(1297/72)
67 -(173/13)
68 -83
69 9
70 1092
71 5/2
72 -(372/5)
73 5
74 76/3
75 13
76 -1263
77 -(66/7)
78 -104
79 318
80 11/18
81 -(43/153)
82 53
83 231
84 115/11
85 -(77/6)
86 20/19
87 432/11
88 301
89 -(411/20)
90 83
91 5
92 74
93 3/2
94 14/3
95 20
96 369/52
97 -(21/8)
98 203
99 -(64/3)
100 -18
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]+1…展開
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= -8
1.125+[-17/5]+[-1/8]+[-0.6]= -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
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)/1/2
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
有理數的加减混合運算
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)- +()×(-2.4).
2.計算題:(10′×5=50′)
(1)-23÷1×(-1)2÷(1)2;
(2)-14-(2-0.5)××[()2-()3];
(3)-1×[1-3×(-)2]-()2×(-2)3÷(-)3
(4)(0.12+0.32)÷[-22+(-3)2-3×];
(5)-6.24×32+31.2×(-2)3+(-0.51)×624.
[-|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)/1/2
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
75÷〔138÷(100-54)〕85×(95-1440÷24)
80400-(4300+870÷15)240×78÷(154-115)
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)[37.85-(7.85+6.4)]×30
156×[(17.7-7.2)÷3](947-599)+76×64
36×(913-276÷23)[192-(54+38)]×67
[(7.1-5.6)×0.9-1.15]÷2.5 81432÷(13×52+78)
5.4÷[2.6×(3.7-2.9)+0.62](947-599)+76×64 60-(9.5+28.9)]÷0.18 2.881÷0.43-0.24×3.5 20×[(2.44-1.8)÷0.4+0.15] 28-(3.4 1.25×2.4)0.8×〔15.5-(3.21 5.79)〕(31.8 3.2×4)÷5 194-64.8÷1.8×0.9 36.72÷4.25×9.9 3.416÷(0.016×35)0.8×[(10-6.76)÷1.2]
(136+64)×(65-345÷23)(6.8-6.8×0.55)÷8.5
0.12×4.8÷0.12×4.8(58+37)÷(64-9×5)
812-700÷(9+31×11)(3.2×1.5+2.5)÷1.6
85+14×(14+208÷26)120-36×4÷18+35
(284+16)×(512-8208÷18)9.72×1.6-18.305÷7
4/7÷[1/3×(3/5-3/10)](4/5+1/4)÷7/3+7/10
12.78-0÷(13.4+156.6)37.812-700÷(9+31×11)(136+64)×(65-345÷23)3.2×(1.5+2.5)÷1.6
85+14×(14+208÷26)(58+37)÷(64-9×5)
(6.8-6.8×0.55)÷8.5(284+16)×(512-8208÷18)
0.12×4.8÷0.12×4.8(3.2×1.5+2.5)÷1.6
120-36×4÷18+35 10.15-10.75×0.4-5.7
5.8×(3.87-0.13)+4.2×3.74 347+45×2-4160÷52
32.52-(6+9.728÷3.2)×2.5 87(58+37)÷(64-9×5)
[(7.1-5.6)×0.9-1.15]÷2.5(3.2×1.5+2.5)÷1.6
5.4÷[2.6×(3.7-2.9)+0.62] 12×6÷(12-7.2)-6
3.2×6+(1.5+2.5)÷1.6(3.2×1.5+2.5)÷1.6
5.8×(3.87-0.13)+4.2×3.74
33.02-(148.4-90.85)÷2.5
(一)計算題:
(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. 3/7×49/9 - 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
0.12χ+1.8×0.9=7.2(9-5χ)×0.3=1.02 6.4χ-χ=28+4.4
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
31.50+160÷40(58+370)÷(64-45)
32.120-144÷18+35
33.347+45×2-4160÷52
34(58+37)÷(64-9×5)
35.95÷(64-45)
36.178-145÷5×6+42 420+580-64×21÷28
37.812-700÷(9+31×11)(136+64)×(65-345÷23)
38.85+14×(14+208÷26)
39.(284+16)×(512-8208÷18)
40.120-36×4÷18+35
41.(58+37)÷(64-9×5)
42.(6.8-6.8×0.55)÷8.5
43.0.12×4.8÷0.12×4.8
44.(3.2×1.5+2.5)÷1.6(2)3.2×(1.5+2.5)÷1.6
45.6-1.6÷4= 5.38+7.85-5.37=
46.7.2÷0.8-1.2×5= 6-1.19×3-0.43=
47.6.5×(4.8-1.2×4)= 0.68×1.9+0.32×1.9
48.10.15-10.75×0.4-5.7
49.5.8×(3.87-0.13)+4.2×3.74
50.32.52-(6+9.728÷3.2)×2.5
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收起
有些打不了我上傳我的文庫了
[-|98|+76+(-87)]*23[56+(-75)-(7)]-(8+4+3)
5+21*8/2-6-59
68/21-8-11*8+6