A.-6×(-5)×(-3)×(-2)=180 | ||||||
B.(-36)×(
| ||||||
C.(-15)×(-4)×(+
| ||||||
D.-3×(+5)-3×(-1)-(-3)×2=-3×(5-1-2)=-6 |
2 |
3 |
1 |
2 |
5 |
9 |
5 |
6 |
7 |
12 |
1 |
2 |
3 |
10 |
2 |
5 |
1 |
2 |
3 |
10 |
2 |
5 |
A.乘法交换律及乘法结合律 |
B.乘法交换律及分配律 |
C.加法结合律及分配律 |
D.乘法结合律及分配律 |
7 |
8 |
3 |
4 |
2 |
13 |
1 |
3 |
1 |
6 |
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