| 2011 |
| 2012 |
| 1 |
| 2013 |
=2011÷
| 2011×2012+2011 |
| 2012 |
| 1 |
| 2013 |
=2011×
| 2012 |
| 2011×(2012+1) |
| 1 |
| 2013 |
=
| 2012 |
| 2013 |
| 1 |
| 2013 |
=1
2011÷20112011/2012+1/2013，简便运算．
2011÷2011
+
，简便运算．
| 2011 |
| 2012 |
| 1 |
| 2013 |
数学人气：318 ℃时间：2019-10-03 10:08:41
优质解答
2011÷2011
+
=2011÷
+
=2011×
+
=
+
=1
=2011÷
=2011×
=
=1
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