文档介绍：-(+)
--
-(-)
--
---
+-+
-+-
-(+)
-++
++
-(+)
-(-)
609-708+306-108+202-198+497-100
14+15+16+……+45+46
9999+9998+9997+9996
99999×26+33333×22
19175÷59+678
×-÷
-+-
8×××
125×(8++)
35 ÷〔78 -(25 +38 )〕
+150 +
-(+58 )
××2+×
--
×
25××32
(++)×
+++
12 ×1120 +12 ×2049
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
16. 5/9 × 18 - 14 × 2/7
17. 4/5 × 25/16 + 2/3 × 3/4
18. 14 × 8/7 - 5/6 × 12/15
20. 3 × 2/9 + 1/3
21. 5/7 × 3/25 + 3/7
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
+160÷40
-144÷18+35
+45×2-4160÷52
34(58+37)÷(64-9×5)
÷(64-45)
+14×(14+208÷26)
39.(284+16)×(512-8208÷18)
-36×4÷18+35
41.(5