题目内容
计算:2003
+2004÷2004
= .
| 2003 |
| 2006 |
| 2004 |
| 2005 |
考点:分数的巧算
专题:计算问题(巧算速算)
分析:将带分数写成假分数,再根据乘法分配律进行化简.
解答:
解;2003
+2004÷2004
=
+2004÷
=
+2004÷
=
+2004×
=
+
=
+
=
=
=2005-
=2004
故答案为:2004
.
| 2003 |
| 2006 |
| 2004 |
| 2005 |
=
| 2003×2006+2003 |
| 2006 |
| 2004×2005+2004 |
| 2005 |
=
| 2003×(2006+1) |
| 2006 |
| 2004×(2005+1) |
| 2005 |
=
| 2003×2007 |
| 2006 |
| 2005 |
| 2004×2006 |
=
| (2005-2)×(2005+2) |
| 2006 |
| 2005 |
| 2006 |
=
| 2005×2005-4 |
| 2006 |
| 2005 |
| 2006 |
=
| 2005×2005-4+2005 |
| 2006 |
=
| 2005×2006-4 |
| 2006 |
=2005-
| 4 |
| 2006 |
=2004
| 1001 |
| 1003 |
故答案为:2004
| 1001 |
| 1003 |
点评:本题考查分数的巧算.须根据乘法分配律的知识进行计算.
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