1 |
3 |
3 |
4 |
1 |
6 |
1 |
3 |
3 |
4 |
1 |
6 |
1 |
2 |
1 |
3 |
1 |
4 |
A.加法交换律 | B.加法结合律 | C.乘法交换律 | D.乘法分配律 |
1 |
5 |
1 |
16 |
1 |
64 |
2 |
7 |
4 |
5 |
1 |
4 |
4 |
5 |
3 |
8 |
3 |
4 |
1 |
3 |
22 |
7 |
22 |
7 |
22 |
7 |
1 |
3 |
46 |
3 |
1 |
8 |
46 |
24 |
23 |
12 |
11 |
12 |
1 |
3 |
1 |
8 |
1 |
8 |
1 |
3 |
1 |
8 |
15×3+1 |
24 |
11 |
12 |
2 |
3 |
2 |
3 |
1 |
12 |
11 |
12 |
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