| 1 |
| 8 |
| 1 |
| 2009 |
| 1 |
| 2001 |
| 1 |
| 2009 |
| 1 |
| 8 |
| 1 |
| 2001 |
=8+
| 2001 |
| 8 |
| 2001 |
| 2009 |
| 8 |
| 2001 |
| 8 |
| 2009 |
| 2009 |
| 8 |
| 2009 |
| 2001 |
=8+（
| 2001 |
| 8 |
| 2009 |
| 8 |
| 2001 |
| 2009 |
| 8 |
| 2009 |
| 2009 |
| 2001 |
| 8 |
| 2001 |
=8-1-1-1
=5
简便运算：8+2001×(1/8−1/2009)+8×(1/2001−1/2009）−2009×(1/8+1/2001)．
简便运算：8+2001×(
−
)+8×(
−
）−2009×(
+
)．
| 1 |
| 8 |
| 1 |
| 2009 |
| 1 |
| 2001 |
| 1 |
| 2009 |
| 1 |
| 8 |
| 1 |
| 2001 |
数学人气：509 ℃时间：2020-03-31 20:52:54
优质解答
8+2001×（
-
）+8×（
-
）-2009×（
+
）
=8+
-
+
-
-
-
=8+（
-
）-（
+
）-（
-
）
=8-1-1-1
=5
=8+
=8+（
=8-1-1-1
=5
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