题目内容
计算:|
-
|+|
-
|+|
-
|+…+|
-
|.
| 1 |
| 4 |
| 1 |
| 2 |
| 1 |
| 6 |
| 1 |
| 4 |
| 1 |
| 8 |
| 1 |
| 6 |
| 1 |
| 2008 |
| 1 |
| 2006 |
分析:利用绝对值的意义去掉绝对值,把互为相反数的两个数字抵消,计算得出结果即可.
解答:解:|
-
|+|
-
|+|
-
|+…+|
-
|
=
-
+
-
+
-
+…+
-
=
-
=
.
| 1 |
| 4 |
| 1 |
| 2 |
| 1 |
| 6 |
| 1 |
| 4 |
| 1 |
| 8 |
| 1 |
| 6 |
| 1 |
| 2008 |
| 1 |
| 2006 |
=
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 6 |
| 1 |
| 6 |
| 1 |
| 8 |
| 1 |
| 2006 |
| 1 |
| 2008 |
=
| 1 |
| 2 |
| 1 |
| 2008 |
=
| 1003 |
| 2008 |
点评:此题考查有理数的加减混合运算,注意把互为相反数的两个数先抵消;以及绝对值的意义.
练习册系列答案
相关题目