3 |
4 |
3 |
7 |
1 |
5 |
1 |
25 |
2 |
3 |
3 |
5 |
8 |
15 |
7 |
3 |
3 |
4 |
7 |
3 |
147 |
2 |
1 |
5 |
1 |
10 |
2 |
3 |
3 |
5 |
15 |
8 |
9 |
8 |
1 |
3 |
1 |
4 |
1 |
2 |
A.加法交换律 | B.分配律 | C.乘法交换律 | D.乘法结合律 |
1 |
3 |
3 |
7 |
3 |
16 |
16 |
9 |
5 |
6 |
3 |
8 |
1 |
12 |
A.-5×(-4)×(-2)×(-2)=5×4×2×2=80 |
B.12×(-5)=-50 |
C.(-9)×5×(-4)×0=9×5×4=180 |
D.(-36)×(-1)=-36 |
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