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
æçæ°çå åæ··åè¿ç®
1ï¼è®¡ç®é¢
ï¼1ï¼3ï¼28-4ï¼76+1 - ï¼
ï¼2ï¼2ï¼75-2 -3 +1 ï¼
ï¼3ï¼42÷ï¼-1 ï¼-1 ÷ï¼-0.125ï¼;
ï¼4ï¼(-48) ÷82-(-25) ÷(-6)2;
ï¼5ï¼- +( )Ã(-2.4).
2.计ç®é¢ï¼ï¼10â²Ã5=50â²ï¼
ï¼1ï¼-23÷1 Ãï¼-1 ï¼2÷ï¼1 ï¼2ï¼
ï¼2ï¼-14-ï¼2-0.5ï¼Ã Ã[( )2-( )3];
ï¼3ï¼-1 Ã[1-3Ã(- )2]-( )2Ã(-2)3÷(- )3
ï¼4ï¼(0.12+0.32) ÷ [-22+(-3)2-3 à ];
(5)-6.24Ã32+31.2Ã(-2)3+(-0.51) Ã624.
[-|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÷ã138÷ï¼100-54ï¼ã 85Ã(95ï¼1440÷24)
80400ï¼(4300ï¼870÷15) 240Ã78÷ï¼154-115ï¼
1437Ã27ï¼27Ã563 ã75-ï¼12+18ï¼ã÷15
2160÷ãï¼83-79ï¼Ã18ã 280ï¼840÷24Ã5
325÷13Ã(266ï¼250) 85Ã(95ï¼1440÷24)
58870÷(105ï¼20Ã2) 1437Ã27ï¼27Ã563
81432÷(13Ã52ï¼78) [37.85-ï¼7.85+6.4ï¼] Ã30
156Ã[(17.7-7.2)÷3] ï¼947ï¼599ï¼ï¼76Ã64
36Ã(913ï¼276÷23) [192ï¼ï¼54ï¼38ï¼]Ã67
[ï¼7.1-5.6ï¼Ã0.9-1.15]÷2.5 81432÷(13Ã52ï¼78)
5.4÷[2.6Ãï¼3.7-2.9ï¼+0.62] ï¼947ï¼599ï¼ï¼76Ã64 60ï¼(9.5ï¼28.9)]÷0.18 2.881÷0.43ï¼0.24Ã3.5 20Ã[(2.44ï¼1.8)÷0.4ï¼0.15] 28-(3.4 1.25Ã2.4) 0.8Ãã15.5-(3.21 5.79)ã ï¼31.8 3.2Ã4ï¼Ã·5 194ï¼64.8÷1.8Ã0.9 36.72÷4.25Ã9.9 3.416÷ï¼0.016Ã35ï¼ 0.8Ã[(10ï¼6.76)÷1.2]
ï¼136+64ï¼Ãï¼65-345÷23ï¼ (6.8-6.8Ã0.55)÷8.5
0.12à 4.8÷0.12Ã4.8 ï¼58+37ï¼Ã·ï¼64-9Ã5ï¼
812-700÷ï¼9+31Ã11ï¼ ï¼3.2Ã1.5+2.5ï¼Ã·1.6
85+14Ãï¼14+208÷26ï¼ 120-36Ã4÷18+35
ï¼284+16ï¼Ãï¼512-8208÷18ï¼ 9.72Ã1.6-18.305÷7
4/7÷[1/3Ãï¼3/5-3/10ï¼] ï¼4/5+1/4ï¼Ã·7/3+7/10
12.78ï¼0Ã·ï¼ 13.4ï¼156.6 ï¼ 37.812-700÷ï¼9+31Ã11ï¼ ï¼136+64ï¼Ãï¼65-345÷23ï¼ 3.2Ãï¼1.5+2.5ï¼Ã·1.6
85+14Ãï¼14+208÷26ï¼ ï¼58+37ï¼Ã·ï¼64-9Ã5ï¼
(6.8-6.8Ã0.55)÷8.5 ï¼284+16ï¼Ãï¼512-8208÷18ï¼
0.12à 4.8÷0.12Ã4.8 ï¼3.2Ã1.5+2.5ï¼Ã·1.6
120-36Ã4÷18+35 10.15-10.75Ã0.4-5.7
5.8Ãï¼3.87-0.13ï¼+4.2Ã3.74 347+45Ã2-4160÷52
32.52-ï¼6+9.728÷3.2ï¼Ã2.5 87ï¼58+37ï¼Ã·ï¼64-9Ã5ï¼
[ï¼7.1-5.6ï¼Ã0.9-1.15] ÷2.5 ï¼3.2Ã1.5+2.5ï¼Ã·1.6
5.4÷[2.6Ãï¼3.7-2.9ï¼+0.62] 12Ã6÷ï¼12-7.2ï¼-6
3.2Ã6+ï¼1.5+2.5ï¼Ã·1.6 ï¼3.2Ã1.5+2.5ï¼Ã·1.6
5.8Ãï¼3.87-0.13ï¼+4.2Ã3.74
33.02ï¼ï¼148.4ï¼90.85ï¼Ã·2.5
(ä¸)计ç®é¢:
(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 Ã 49/9 - 4/3
2. 8/9 Ã 15/36 + 1/27
3. 12Ã 5/6 â 2/9 Ã3
4. 8Ã 5/4 + 1/4
5. 6÷ 3/8 â 3/8 ÷6
6. 4/7 Ã 5/9 + 3/7 Ã 5/9
7. 5/2 -ï¼ 3/2 + 4/5 ï¼
8. 7/8 + ï¼ 1/8 + 1/9 ï¼
9. 9 Ã 5/6 + 5/6
10. 3/4 Ã 8/9 - 1/3
0.12Ïï¼1.8Ã0.9=7.2 (9ï¼5Ï)Ã0.3=1.02 6.4Ï-Ï=28+4.4
11. 7 Ã 5/49 + 3/14
12. 6 Ãï¼ 1/2 + 2/3 ï¼
13. 8 Ã 4/5 + 8 Ã 11/5
14. 31 Ã 5/6 â 5/6
15. 9/7 - ï¼ 2/7 â 10/21 ï¼
16. 5/9 Ã 18 â 14 Ã 2/7
17. 4/5 Ã 25/16 + 2/3 Ã 3/4
18. 14 Ã 8/7 â 5/6 Ã 12/15
19. 17/32 â 3/4 Ã 9/24
20. 3 Ã 2/9 + 1/3
21. 5/7 Ã 3/25 + 3/7
22. 3/14 ÃÃ 2/3 + 1/6
23. 1/5 Ã 2/3 + 5/6
24. 9/22 + 1/11 ÷ 1/2
25. 5/3 Ã 11/5 + 4/3
26. 45 Ã 2/3 + 1/3 Ã 15
27. 7/19 + 12/19 Ã 5/6
28. 1/4 + 3/4 ÷ 2/3
29. 8/7 Ã 21/16 + 1/2
30. 101 Ã 1/5 â 1/5 Ã 21
31.50ï¼160÷40 ï¼58+370ï¼Ã·ï¼64-45ï¼
32.120-144÷18+35
33.347+45Ã2-4160÷52
34ï¼58+37ï¼Ã·ï¼64-9Ã5ï¼
35.95÷ï¼64-45ï¼
36.178-145÷5Ã6+42 420+580-64Ã21÷28
37.812-700÷ï¼9+31Ã11ï¼ ï¼136+64ï¼Ãï¼65-345÷23ï¼
38.85+14Ãï¼14+208÷26ï¼
39.ï¼284+16ï¼Ãï¼512-8208÷18ï¼
40.120-36Ã4÷18+35
41.ï¼58+37ï¼Ã·ï¼64-9Ã5ï¼
42.(6.8-6.8Ã0.55)÷8.5
43.0.12à 4.8÷0.12Ã4.8
44.ï¼3.2Ã1.5+2.5ï¼Ã·1.6 ï¼2ï¼3.2Ãï¼1.5+2.5ï¼Ã·1.6
45.6-1.6÷4= 5.38+7.85-5.37=
46.7.2÷0.8-1.2Ã5= 6-1.19Ã3-0.43=
47.6.5Ãï¼4.8-1.2Ã4ï¼= 0.68Ã1.9+0.32Ã1.9
48.10.15-10.75Ã0.4-5.7
49.5.8Ãï¼3.87-0.13ï¼+4.2Ã3.74
50.32.52-ï¼6+9.728÷3.2ï¼Ã2.5
51.-5+58+13+90+78-(-56)+50
52.-7*2-57/(3
53.(-7)*2/(1/3)+79/(3+6/4ï¼
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.(-8)-(-1)=(-8)+1=-7
2.45+(-30)=45-30=15
3.-1.5-(-11.5)=-1.5+11.5=10
4.-1/4-(-1/2)=-1/4+1/2=-1/4+2/4=1/4 5.15-[1-(20-4)]15-(1-16)=15-(-15)=15+15=30
6.-40-28-(-19)+(-24)=-40-28+19-24=-73 7.22.54+(-4.4)+(-12.54)+4.4=22.54-4.4-12.54+4.4=10
8.(2/3-1/2)-(1/3-5/6)=(4/6-3/6)-(2/6-5/6)=1/6-(-3/6)=1/6+3/6=4/6=2/3
[-|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 -1-23.33-(+76.76); 1-2*2*2*2; (-6-24.3)-(-12+9.1)+(0-2.1); -1+8-7 -20+(-14)+(-2)+19 66+(-21)-(-21)+15 41-6+ï¼-51ï¼ -9+2-3 1/7+5/6+ï¼-1/7ï¼ 13+ï¼-5ï¼+ï¼-6ï¼+ï¼+34ï¼ -5+6+9-7 1/8+ï¼-1/4ï¼+ï¼-6ï¼ -17+8+9+ï¼-14ï¼ 25+ï¼-18ï¼+ï¼-17ï¼+ï¼-22ï¼
çæ¡è¡¥å
[-|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 1
8-6/(-3)*(-2)
(5+3/8*8/30/(-2)-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
-1+2-3+4-5+6-7
-50-28+(-24)-(-22)
-19.8-(-20.3)-(+20.2)-10.8
0.25- +(-1 )-(+3 )
-1-ã1-(1-0.6÷3)ãÃã2-(-3)Ã(-4)ã
0÷(-4)-42-(-8)÷(-1)3
-32-(-3) 2-(-3)3+(-1)6
3Ã(-2)2+(-2Ã3)2+(-2+3)2
(-12)÷4Ã(-6)÷2
(-12)÷4Ã(-6)Ã2
75÷ã138÷ï¼100-54ï¼ã
85Ã(95ï¼1440÷24)
80400ï¼(4300ï¼870÷15)
240Ã78÷ï¼154-115ï¼
1437Ã27ï¼27Ã563
ã75-ï¼12+18ï¼ã÷15
2160÷ãï¼83-79ï¼Ã18ã
280ï¼840÷24Ã5
325÷13Ã(266ï¼250)
85Ã(95ï¼1440÷24)
58870÷(105ï¼20Ã2)
1437Ã27ï¼27Ã563
81432÷(13Ã52ï¼78)
[37.85-ï¼7.85+6.4ï¼] Ã30
156Ã[(17.7-7.2)÷3]
ï¼947ï¼599ï¼ï¼76Ã64
36Ã(913ï¼276÷23)
-(3.4 1.25Ã2.4)
0.8Ãã15.5-(3.21 5.79)ã
ï¼31.8 3.2Ã4ï¼Ã·5
194ï¼64.8÷1.8Ã0.9 36.72÷4.25Ã9.9
3.416÷ï¼0.016Ã35ï¼
0.8Ã[(10ï¼6.76)÷1.2]
ï¼136+64ï¼Ãï¼65-345÷23ï¼
(6.8-6.8Ã0.55)÷8.5
0.12à 4.8÷0.12Ã4.8
ï¼58+37ï¼Ã·ï¼64-9Ã5ï¼
812-700÷ï¼9+31Ã11ï¼
ï¼3.2Ã1.5+2.5ï¼Ã·1.6
85+14Ãï¼14+208÷26ï¼
120-36Ã4÷18+35
ï¼284+16ï¼Ãï¼512-8208÷18ï¼
9.72Ã1.6-18.305÷7
4/7÷[1/3Ãï¼3/5-3/10ï¼]
ï¼4/5+1/4ï¼Ã·7/3+7/10
12.78ï¼0Ã·ï¼ 13.4ï¼156.6 ï¼
37.812-700÷ï¼9+31Ã11ï¼
ï¼136+64ï¼Ãï¼65-345÷23ï¼
3.2Ãï¼1.5+2.5ï¼Ã·1.6
85+14Ãï¼14+208÷26ï¼
ï¼58+37ï¼Ã·ï¼64-9Ã5ï¼
(6.8-6.8Ã0.55)÷8.5
ï¼284+16ï¼Ãï¼512-8208÷18ï¼
0.12à 4.8÷0.12Ã4.8
ï¼3.2Ã1.5+2.5ï¼Ã·1.6
120-36Ã4÷18+35
10.15-10.75Ã0.4-5.7
5.8Ãï¼3.87-0.13ï¼
+4.2Ã3.74 347+45Ã2-4160÷52
32.52-ï¼6+9.728÷3.2ï¼Ã2.5 87ï¼58+37ï¼Ã·ï¼64-9Ã5ï¼
[ï¼7.1-5.6ï¼Ã0.9-1.15] ÷2.5 ï¼3.2Ã1.5+2.5ï¼Ã·1.6
5.4÷[2.6Ãï¼3.7-2.9ï¼+0.62]
12Ã6÷ï¼12-7.2ï¼-6
3.2Ã6+ï¼1.5+2.5ï¼Ã·1.6
ï¼3.2Ã1.5+2.5ï¼Ã·1.6
5.8Ãï¼3.87-0.13ï¼+4.2Ã3.74
33.02ï¼ï¼148.4ï¼90.85ï¼Ã·2.5
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