挑战开始！这里为您准备了100道20以内的加减混合运算题，包含括号，旨在考验和提升您的计算速度与准确性。准备好了吗？请开始计算：
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20以内加减混合运算100题（含括号）挑战
1. (10 - 3) + 5
2. 8 + (7 - 2)
3. 12 - (6 + 1)
4. (9 - 4) + 8
5. 15 - (5 + 3)
6. 6 + (10 - 7)
7. (8 - 5) - 2
8. 14 - (9 - 4)
9. (7 + 2) - 5
10. 11 - (8 - 3)
11. (4 + 6) + 1
12. 13 - (7 + 2)
13. (5 - 1) + 9
14. 10 - (6 - 2)
15. (3 + 7) - 4
16. 16 - (8 + 4)
17. (9 - 6) + 7
18. 12 - (5 + 3)
19. (8 - 3) + 6
20. 9 - (7 - 1)
21. (2 + 8) + 3
22. 15 - (10 - 5)
23. (7 - 2) - 1
24. 11 - (4 + 4)
25. (6 + 3) - 8
26. 14 - (9 - 5)
27. (5 - 0) + 9
28. 10 - (3 + 6)
29. (8 + 2) - 7
30. 13 - (8 - 4)
31. (4 - 1) + 10
32. 17 - (9 + 1)
33. (7 - 5) + 6
34. 12 - (6 - 3)
35. (9 - 8) + 7
36. 15 - (7 + 1)
37. (3 + 5) - 2
38. 11 - (5 + 2)
39. (6 - 4) + 8
40. 14 - (10 - 6)
41. (8 - 7) + 9
42. 10 - (4 + 3)
43. (5 + 4) - 6
44. 13 - (8 - 5)
45. (7 - 3) + 5
46. 16 - (9 - 2)
47. (2 + 9) - 5
48. 12 - (7 + 1)
49. (10 - 6) + 3
50. 9 - (4 + 2)
51. (8 - 2) - 1
52. 15 - (6 + 3)
53. (4 + 5) - 7
54. 11 - (9 - 3)
55. (6 - 3) + 7
56. 14 - (8 + 0)
57. (9 - 1) + 4
58. 17 - (10 - 5)
59. (5 - 2) + 8
60. 13 - (7 + 2)
61. (7 + 1) - 4
62. 16 - (9 - 3)
63. (3 + 8) - 6
64. 12 - (5 + 4)
65. (10 - 7) + 6
66. 9 - (8 - 1)
67. (4 - 2) + 9
68. 15 - (10 - 4)
69. (6 + 2) - 5
70. 11 - (6 + 1)
71. (8 - 5) + 10
72. 14 - (7 + 3)
73. (9 - 9) + 7
74. 13 - (5 + 0)
75. (3 + 6) - 8
76. 17 - (12 - 4)
77. (7 - 4) + 5
78. 12 - (8 - 3)
79. (5 + 5) - 7
80. 16 - (10 - 6)
81. (2 + 7) - 1
82. 11 - (9 - 6)
83. (8 - 8) + 9
84. 15 - (7 + 4)
85. (4 + 4) - 5
86. 13 - (10 - 7)
87. (6 - 2) + 8
88. 17 - (8 + 2)
89. (9 - 3) + 2
90. 14 - (6 + 0)
91. (5 - 1) + 7
92. 12 - (9 - 5)
93. (7 + 3) - 9
94. 10 - (4 + 5)
95. (8 - 6) + 4
96. 15 - (7 + 5)
97. (2 + 10) - 8
98. 13 - (3 + 6)
99. (6 - 0) + 5
100. 16 - (9 - 7)
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请仔细计算每一道题的结果。这些题目融合了加法和减法，并且加入了括号来改变运算顺序，这无疑是对您心算能力和对运算规则掌握程度的综合考验。计算时请注意先算括号内的部分，再进行外部的加减运算。
祝您挑战顺利，计算愉快！完成之后，您可以核对答案，看看自己的准确率如何。如果您需要答案或对某些题目有疑问，随时可以提出。
