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10 questions
交換律、分配律
交換律、結合律
分配律、結合律
交換律、分配律、結合律
甲>乙>丙>丁
乙>甲>丙>丁
丙>丁>乙>甲
丁>丙>甲>乙
14
15
16
17
30
32
34
36
12
24
38
-42
-50
60
75
90
120
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