1楼:匿名用户
(-3)-[(-5)÷3+(1-2又1/3×0.6)]×3又3/4= -3 -[ -5/3+ (1-1.4)]×15/4= -3 -( -5/3-0.
4)×15/4= -3+5/3×15/4+0.4×15/4= -3+25/4+1.5
=4.75
(+1/2)-(+5+)+(-1/3)-(+1/4)+(-5又2/3)
2楼:匿名用户
原始=(1—1/2)+(1+1/2)(1—1/3)(1+1/3)(1—1/4)(1+1/4)……(1—1/10)(1+1/10) =(1/2)*(3/2)*(2/3)*(4/3)*(3/4)*(5/4)……(9/10)*(11/10) =(1/2)*(11/10) =11/20主要运用a
3楼:匿名用户
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 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 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 37.812-700÷(9+31×11) 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 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)= 49.5.8×(3.
87-0.13)+4.2×3.
74 50.32.52-(6+9.
728÷3.2)×2.5 51.
[(7.1-5.6)×0.
9-1.15] ÷2.5 52.
5.4÷[2.6×(3.
7-2.9)+0.62] 53.
12×6÷(12-7.2)-6 (54)12×6÷7.2-6 (55)0.
68×1.9+0.32×1.
9 (56)(58+370)÷(64-45) (57)420+580-64×21÷28 (58)(136+64)×(65-345÷23) (59)48.10.15-10.
75×0.4-5.7 1.
18.1+(3-0.299÷0.
23)×1 2.(6.8-6.
8×0.55)÷8.5 3.
0.12× 4.8÷0.
12×4.8 4.(3.
2×1.5+2.5)÷1.
6 (2)3.2×(1.5+2.
5)÷1.6 5.6-1.
6÷4= 5.38+7.85-5.
37= 6.7.2÷0.
8-1.2×5= 6-1.19×3-0.
43= 7.6.5×(4.
8-1.2×4)= 0.68×1.
9+0.32×1.9 8.
10.15-10.75×0.
4-5.7 9.5.
8×(3.87-0.13)+4.
2×3.74 10.32.
52-(6+9.728÷3.2)×2.
5 11.[(7.1-5.
6)×0.9-1.15] ÷2.
5 12.5.4÷[2.
6×(3.7-2.9)+0.
62] 13.12×6÷(12-7.2)-6 14.
12×6÷7.2-6 15.33.
02-(148.4-90.85)÷2.
5 158+262+138 375+219+381+225 5001-247-1021-232 (181+2564)+2719 378+44+114+242+222 276+228+353+219 (375+1034)+(966+125) (2130+783+270)+
4楼:匿名用户
-2.4+4.7-0.
5+3.4-3.5=-2.
3-0.5+3.4-3.
5=-2.8+3.4-3.
5=-0.6-3.5=-4.
1不知道对错与否仅供参考
(-3/5)x(-3又1/2)÷(-1又1/4)÷3
5楼:匿名用户
(-3/5)x(-3又1/2)÷(-1又1/4)÷3=(-3/5)x(-7/2)÷(-5/4)÷3= - 3/5 x 7/2 x 4/5 x 1/3= - 14/25
(-49)÷(-2又1/3)÷7/3除以(-3)=(-49)÷(-7/3)÷ 7/3 ÷ (-3)= - 49 × 3/7 × 3/7 ×1/3= - 3
6楼:新野旁观者
(-3/5)x(-3又1/2)÷(-1又1/4)÷3=-(3/5×
1/3)×(7/2×5/4)
=-1/5×35/8
=-7/8
(-49)÷(-2又1/3)÷7/3除以(-3)=-49×3/7×3/7×1/3
=-21×3/7×1/3
=-9×1/3=-3
7楼:徐秀平不是我
(-3/5)x(-3又1/2)÷(-1又1/4)÷3=(-3/5)x(-7/2)÷(-5/4)÷3= - 3/5 x 7/2 x 4/5 x 1/3= - 14/25
20-(5.55x1又1 3-2又7 10)0.
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