以下是100道适合四年级学生练习的乘法结合律计算题：
1. 25 × 4 × 8
2. 125 × 8 × 3
3. 5 × 2 × 99
4. 6 × (5 × 7)
5. (25 × 4) × 12
6. 7 × (10 × 3)
7. 15 × (4 × 6)
8. (125 × 8) × 5
9. 3 × (5 × 8)
10. 24 × (5 × 10)
11. (3 × 4) × 25
12. 9 × (2 × 5)
13. 48 × (5 × 2)
14. 60 × (2 × 3)
15. (15 × 4) × 7
16. 8 × (3 × 125)
17. 50 × (2 × 4)
18. (20 × 5) × 6
19. 7 × (8 × 125)
20. 36 × (5 × 2)
21. (6 × 7) × 5
22. 10 × (3 × 4)
23. 45 × (2 × 4)
24. 12 × (5 × 8)
25. (24 × 5) × 3
26. 99 × (4 × 5)
27. 28 × (5 × 3)
28. (18 × 5) × 4
29. 6 × (10 × 9)
30. 80 × (3 × 5)
31. (7 × 8) × 125
32. 4 × (3 × 25)
33. 32 × (5 × 6)
34. 150 × (2 × 3)
35. (9 × 5) × 8
36. 75 × (4 × 2)
37. 2 × (5 × 77)
38. (16 × 5) × 12
39. 9 × (4 × 25)
40. 64 × (5 × 5)
41. (8 × 3) × 25
42. 5 × (6 × 12)
43. 42 × (5 × 2)
44. 120 × (2 × 5)
45. (10 × 6) × 7
46. 88 × (5 × 3)
47. 30 × (4 × 3)
48. (25 × 8) × 3
49. 7 × (6 × 5)
50. 144 × (5 × 2)
51. (7 × 9) × 4
52. 3 × (8 × 25)
53. 56 × (5 × 3)
54. 180 × (2 × 3)
55. (12 × 5) × 6
56. 90 × (4 × 2)
57. 4 × (7 × 11)
58. (20 × 4) × 15
59. 6 × (8 × 25)
60. 96 × (5 × 5)
61. (9 × 4) × 25
62. 6 × (5 × 10)
63. 39 × (5 × 2)
64. 240 × (2 × 5)
65. (8 × 7) × 5
66. 72 × (5 × 3)
67. 45 × (4 × 2)
68. (30 × 8) × 2
69. 9 × (8 × 5)
70. 192 × (5 × 2)
71. (8 × 6) × 125
72. 2 × (4 × 25)
73. 64 × (5 × 3)
74. 300 × (2 × 3)
75. (15 × 5) × 4
76. 100 × (4 × 2)
77. 5 × (8 × 11)
78. (12 × 10) × 6
79. 3 × (10 × 25)
80. 128 × (5 × 5)
81. (10 × 3) × 25
82. 7 × (6 × 10)
83. 33 × (5 × 2)
84. 480 × (2 × 5)
85. (6 × 10) × 7
86. 176 × (5 × 3)
87. 60 × (4 × 2)
88. (40 × 8) × 1.5
89. 8 × (10 × 5)
90. 384 × (5 × 2)
91. (9 × 8) × 6.25
92. 1 × (8 × 25)
93. 128 × (5 × 1.5)
94. 600 × (2 × 1.5)
95. (24 × 5) × 2
96. 200 × (4 × 1)
97. 10 × (12 × 1.1)
98. (8 × 20) × 7.5
99. 2 × (15 × 25)
100. 256 × (5 × 2.5)
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