题目内容
计算:
①(-5)×(-8)
②(-1
)×(+1
)
③(-2011)×0
④
×
.
①(-5)×(-8)
②(-1
3 |
7 |
2 |
5 |
③(-2011)×0
④
15 |
8 |
4 |
15 |
①(-5)×(-8)=40;
②(-1
)×(+1
)=-
×
=-2;
③(-2011)×0=0;
④
×
=
.
②(-1
3 |
7 |
2 |
5 |
10 |
7 |
7 |
5 |
③(-2011)×0=0;
④
15 |
8 |
4 |
15 |
1 |
2 |
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