题目内容
观察巧算:
×
+
×
+
×
=
.
| 2005 |
| 1003 |
| 2 |
| 2007 |
| 2005 |
| 2006 |
| 2005 |
| 2007 |
| 2005 |
| 3009 |
| 3 |
| 2007 |
| 4032055 |
| 4026042 |
| 4032055 |
| 4026042 |
分析:通过观察,原式变为
×
+
×
+
×
,运用乘法分配律简算.
| 2005 |
| 2007 |
| 2 |
| 1003 |
| 2005 |
| 2007 |
| 2005 |
| 2006 |
| 2005 |
| 2007 |
| 1 |
| 1003 |
解答:解:
×
+
×
+
×
,
=
×
+
×
+
×
,
=
×(
+
+
),
=
×
,
=
.
故答案为:
.
| 2005 |
| 1003 |
| 2 |
| 2007 |
| 2005 |
| 2006 |
| 2005 |
| 2007 |
| 2005 |
| 3009 |
| 3 |
| 2007 |
=
| 2005 |
| 2007 |
| 2 |
| 1003 |
| 2005 |
| 2007 |
| 2005 |
| 2006 |
| 2005 |
| 2007 |
| 1 |
| 1003 |
=
| 2005 |
| 2007 |
| 2 |
| 1003 |
| 2005 |
| 2006 |
| 1 |
| 1003 |
=
| 2005 |
| 2007 |
| 2011 |
| 2006 |
=
| 4032055 |
| 4026042 |
故答案为:
| 4032055 |
| 4026042 |
点评:对于这种类型的题目,应认真审题,运用运算定律或运算技巧,灵活解答.
练习册系列答案
相关题目