2 |
3 |
2 |
7 |
1 |
3 |
5 |
7 |
2 |
3 |
2 |
7 |
1 |
3 |
5 |
7 |
2 |
3 |
1 |
3 |
2 |
7 |
5 |
7 |
2 |
3 |
1 |
3 |
2 |
7 |
5 |
7 |
A.(-7)×(-6) | B.(-6)×3 | C.0×(-2) | D.(-7)×(-15) |
A.(-2)×(-3)=6 | B.(-
| ||
C.(-5)×(-2)×(-4)=-40 | D.(-3)×(-2)×(-4)=-24 |
A.0×(-3)×(-4)×(-5) | B.(-6)×(-15)×(-
| ||||
C.-2×(-12)×(+2) | D.-1×(-5)×(-3) |
1 |
2 |
1 |
4 |
1 |
6 |
1 |
2 |
1 |
4 |
1 |
6 |
A.运用了结合律 | B.运用了乘法交换律 |
C.①是分配律 | D.②是分配律 |
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