> 数学 >
简便运算:8+2001×(
1
8
1
2009
)+8×(
1
2001
1
2009
−2009×(
1
8
+
1
2001
)
人气:223 ℃ 时间:2020-03-31 20:52:54
解答
8+2001×(
1
8
-
1
2009
)+8×(
1
2001
-
1
2009
)-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
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