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1、建筑
1.25 X (8+10)
=1.25X 8+1.25X 10
=10+12.5=22.5
9123- (123+8.8)
=9123-123-8.8
=9000-8.8
=8991.2
1.24X8.3+8.3X 1.76
=8.3X ( 1.24+1.76)
=8.3X 3=24.9
9999 X1001
=9999 X ( 1000+1 )
=9999X 1000+9999 乂 1
=10008999
14.8X6.3-6.3 X 6.5+8.3 X 3.7
=(14.8-6.5) X 6.3+8.3X 3.7
=8.3X 6.3+8.3X 3
2、.7
8.3 X (6.3+3.7)
=8.3X 10
=83
1.24+0.78+8.76
=(1.24+8.76) +0.78
=10+0.78
=10.78
933-157-43
=933- (157+43)
=933-200
=733
4821-998
=4821-1000+2
=3823
I32X 125X25
=4X 8X 125 X 25
=(4X25) X ( 8X 125)
=100X1000
=100000
9048 + 268
=(2600+2600+2600+1248) + 26
=2600 + 26+2600+ 26+260
3、0+26+1248 + 269
=100+100+100+48
=348
2881 + 43
=(1290+1591) + 434
=1290+43+1591 + 43
=30+37
3.2 X 42.3 X 3.75-12.5 X 0.423 X 16
=3.2X42.3X 3.75-1.25X 42.3 X 1.6
=42.3 X (3.2 X 3.75-1.25 X 1.6)
=42.3 X (4 X 0.8 X 3.75-1.25 X 4 X 0.4)
=42.3X (4X 0.4X2X 3.75-1.25 X4X 0.4)
=42.3 X (4x0.4x7.5
4、-1.25x4x0.4)
=42.3 X [4 X 0.4 X (7.5-1.25)]
=42.3 X [4 X 0.4X6.25]
=42.3 X (4X 2.5)
=4237
1.8+18+ 1.5-0.5X 0.3
=1.8+12-0.15
=13.8-0.15
=13.65
6.5X8+3.5X 8-47
=52+28-47
=80-47
(80-9.8) X5 分之 2-1.32
=70.2X2/5-1.32
=28.08-1.32
=26.76
8X7 分之 4 + [1 +(3.2-2.95)]
=8X 4/7 - [1 +0.25]
=8X
5、4/7 + 4
=8/7
2700 X (506 — 499) + 900
=2700 X 7+900
=18900+900
=21
33.02- ( 148.4 — 90.85) + 2.5
=33.02- 57.55+2.5
=33.02- 23.02
=10
(1 + 1 — 1) + 5.1
=(1 —1) + 5.1
=0+ 5.1
=0
18.1 + ( 3—0.299 + 0.23) X 1
=18.1 + 1.7X 1
=18.1 + 1.7
=19.8
[-18]+29+[-52]+60= 19
[-3]+[-2]+[-1]+0+1+2=
6、 -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
卜26.54]+[-6.14]+18.54+6.14= -8
1.125+[-17/5]+[-1/8]+[-0.6]= -3
卜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
7、)]/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
1437X27+27X 563 〔75- (12+18)〕+15
2160+〔(83-79) X 18〕280 + 840 + 24X5
325 + 13
8、 X (266 — 250) 85 X (95 — 1440 + 24)
58870 +(105+ 20X2) 1437X 27 + 27* 563
81432+(13X 52+78) [37.85- (7.85+6.4) ] X 30
156 X [(17.7-7.2) + 3] (947-599) + 76 X 64
36X (913 —276 + 23) [192 — (54+38) ]X 67
[(7.1-5.6) X 0.9-1.15]+2.5 81432+(13X52+78)
5.4-[2.6 X (3.7-2.9) +0.62] (947 — 599) + 76X 6
9、4 60—(9.5 + 28.9)] + 0.18 2.881 + 0.43 — 0.24X3.5 20 X [(2.44 —1.8)+ 0.4+ 0.15] 28-(3.4 1.25 X 2.4) 0.8 X[15.5-(3.21 5.79)〕(31.8 3.2 X4) +5 194— 64.8- 1.8 X 0.9 36.72 + 4.25 X 9.9 3.416 + ( 0.016 X 35) 0.8 X [(10 — 6.76) + 1.2]
(136+64) X ( 65-345 + 23) (6.868X 0.55)+8.5
0.12X 4.8+ 0.12X4.8 (58+37
10、) + ( 64-9X 5)
812-700 + ( 9+31 X11) (3.2X 1.5+2.5) + 1.6
85+14X ( 14+208 + 26) 120-36X4 + 18+35
(284+16) X ( 512-8208 + 18) 9.72X 1.6-18.305 + 7
4/7 + [1/3 X ( 3/5-3/10 ) ] (4/5+1/4 ) + 7/3+7/10
12.78 — 0+ ( 13.4+ 156.6 ) 37.812-700+ ( 9+31 X 11) (136+64) X ( 65-345 + 23) 3.2 X ( 1.5+2.5) + 1.
11、6
85+14X ( 14+208 + 26) (58+37) + ( 64-9X 5)
(6.868X 0.55)+8.5 (284+16) X ( 512-8208 + 18)
0.12X 4.8+0.12X4.8 (3.2X 1.5+2.5) +1.6
120-36 X 4 + 18+35 10.15-10.75 X 0.4-5.7
5.8 X (3.87-0.13) +4.2X 3.74 347+45X2-4160 + 52
32.52- (6+9.728 + 3.2) X 2.5 87 (58+37) + ( 64-9X 5) [(7.1-5.6) X 0.9-1.15
12、] +2.5 (3.2 X 1.5+2.5) +1.6 5.4 + [2.6 X (3.7-2.9) +0.62] 12X6+ (12-7.2) -6 3.2X6+ (1.5+2.5) +1.6 ( 3.2 X 1.5+2.5) +1.6
5.8 X (3.87-0.13) +4.2X 3.74
33.02- ( 148.4 — 90.85) + 2.5
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.
13、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 1.3/7 X 49/9 - 4/3
2. 8/9 X 15/36 + 1/27
3. 12X 5/
14、6 —2/9X3
4. 8X 5/4 + 1/4
5. 6+ 3/8 -3/8+6
6. 4/7 X 5/9 + 3/7 X 5/9
7. 5/2 - ( 3/2 + 4/5 )
8. 7/8 + ( 1/8 + 1/9 )
9. 9 X 5/6 + 5/6
10. 3/4 X 8/9 - 1/3
0.12 x + 1.8 X 0.9=7.2 (9 — 5 x ) X 0.3=1.02 6.4 x - x =28+4.4 11.7 X 5/49 + 3/14
12. 6X( 1/2 + 2/3 )
13. 8 X 4/5 + 8 X 11/5
14. 31 X 5/6 —
15、 5/6
15. 9/7 - ( 2/7 - 10/21 )
16. 5/9 X 18 - 14 X 2/7
17. 4/5 X 25/16 + 2/3 X 3/4
18. 14 X 8/7 - 5/6 X 12/15
19. 17/32 - 3/4 X 9/24
20. 3 X 2/9 + 1/3
21. 5/7 X 3/25 + 3/7
22. 3/14 XX 2/3 + 1/6
23. 1/5 X 2/3 + 5/6
24. 9/22 + 1/11 + 1/2
25. 5/3 X 11/5 + 4/3
26. 45 X 2/3 + 1/3 X 15
27. 7
16、/19 + 12/19 X 5/6
28. 1/4 + 3/4 + 2/3
29. 8/7 X 21/16 + 1/2
30. 101 X 1/5 - 1/5 X 21
31. 50 + 160 + 40 (58+370) + ( 64-45)
32.120-144 + 18+35
33.347+45X2-4160 + 52
34 (58+37) + ( 64-9 X 5)
35.95 + (64-45)
36.178-145-5X 6+42 420+580-64 X 21 + 28
37.812-700 + ( 9+31 X 11) (136+64) X ( 65-345
17、 + 23)
38.85+14 X ( 14+208+26)
39. (284+16) X ( 512-8208+ 18)
40.120-36X4+ 18+35
41. (58+37) + ( 64-9X 5)
42.(6.8-6.8 X 0.55)+8.5
43.0.12 X 4.8+0.12X4.8
44. (3.2X 1.5+2.5) +1.6 (2) 3.2 X (1.5+2.5) +1.6
45.6-1.6 + 4= 5.38+7.85-5.37=
46.7.2 + 0.8-1.2 X 5= 6-1.19X 3-0.43=
47.6.5 X ( 4.8-1.2 X
18、4) = 0.68 X 1.9+0.32 X 1.9
48.10.15-10.75X 0.4-5.7
49.5.8 X ( 3.87-0.13) +4.2X 3.74
50.32.52- (6+9.728 + 3.2) X 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)
19、
59.94+(-60)/10
1.
aA3-2bA3+ab(2a-b)
=aA3+2aA2b-2bA3-abA2
=aA2(a+2b)-bA2(2b+a) =(a+2b)(aA2-bA2)
=(a+2b)(a+b)(a-b)
2.
僅人2+丫人2)人2-4丫仇人2+丫人2)+4丫A2 =僅人2+丫人2-2丫)人2
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
20、=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)
21、=2(a+b-c)(a+c)
8.
x(x+1)(xA2+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)
1.3/7 X 49/9 - 4/3
2. 8/9 X 15/36 + 1/27
3. 12X 5/6 —2/9X3
4. 8X 5/4 + 1/4
5. 6+ 3/8 -3/8+6
6. 4/7 X 5/9 + 3/7 X 5/9
7. 5/2 - ( 3/2 + 4/5 )
8. 7/8 + ( 1/8 + 1/9 )
9.
22、9 X 5/6 + 5/6
10. 3/4 X 8/9 - 1/3
0.12 x + 1.8 X 0.9=7.2 (9 — 5 x ) X 0.3=1.02 6.4 x - x =28+4.4
11. 7 X 5/49 + 3/14
12. 6X( 1/2 + 2/3 )
13. 8 X 4/5 + 8 X 11/5
14. 31 X 5/6 — 5/6
15. 9/7 - ( 2/7 - 10/21 )
16. 5/9 X 18 - 14 X 2/7
17. 4/5 X 25/16 + 2/3 X 3/4
18. 14 X 8/7 - 5/6 X 12/15
19. 1
23、7/32 - 3/4 X 9/24
20. 3 X 2/9 + 1/3
21. 5/7 X 3/25 + 3/7
22. 3/14 XX 2/3 + 1/6
23. 1/5 X 2/3 + 5/6
24. 9/22 + 1/11 + 1/2
25. 5/3 X 11/5 + 4/3
26. 45 X 2/3 + 1/3 X 15
27. 7/19 + 12/19 X 5/6
28. 1/4 + 3/4 + 2/3
29. 8/7 X 21/16 + 1/2
30. 101 X 1/5 - 1/5 X 21
31. 50 + 160 + 40 (58+370) + ( 6
24、4-45)
31.120- 144 + 18+35
33.347+45X2-4160 + 52 |
34 (58+37) + ( 64-9 X 5)
35.95 + (64-45)
36.178-145-5X 6+42 420+580-64 X 21 + 28
37.812-700 + ( 9+31 X 11) (136+64) X ( 65-345 + 23)
38.85+14 X ( 14+208+26)
39. (284+16) X ( 512-8208+ 18)
40.120-36X4+ 18+35
41. (58+37) + ( 64-9X 5)
42.(6.8
25、-6.8 X 0.55)+8.5
43.0.12 X 4.8+0.12X4.8
44. (3.2X 1.5+2.5) +1.6 (2) 3.2 X (1.5+2.5) +1.6
45.6-1.6 + 4= 5.38+7.85-5.37=
46.7.2 + 0.8-1.2 X 5= 6-1.19X 3-0.43=
47.6.5 X ( 4.8-1.2 X4) = 0.68 X 1.9+0.32 X 1.9
48.10.15-10.75X 0.4-5.7
49.5.8 X ( 3.87-0.13) +4.2X 3.74 50.32.52- (6+9.728 + 3.2) X 2.5
26、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.
aA3-2bA3+ab(2a-b) =aA3+2aA2b-2bA3-abA2 =aA2(a+2b)-bA2(2b+a) =(a+2b)(aA2-bA2) =(a+2b)(a+b)(a-b) 2.
(xA2+yA2
27、)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) 8.
^(x+1)(xA2+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
初一100道數(shù)學(xué)計(jì)算題及答案
