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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