题目内容
| 20145-2×20144-2012 |
| 20145+20144-2015 |
原式=
=
=
.
| 20144(2014-2)-2012 |
| 20144(2014+1)-2015 |
| 2012(20144-1) |
| 2015(20144-1) |
| 2012 |
| 2015 |
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题目内容
| 20145-2×20144-2012 |
| 20145+20144-2015 |
| 20144(2014-2)-2012 |
| 20144(2014+1)-2015 |
| 2012(20144-1) |
| 2015(20144-1) |
| 2012 |
| 2015 |