简便运算:8+2001×(1/8−1/2009)+8×(1/2001−1/2009)−2009×(1/8+1/2001).
问题描述:
简便运算:8+2001×(
−1 8
)+8×(1 2009
−1 2001
)−2009×(1 2009
+1 8
). 1 2001
答
8+2001×(
-1 8
)+8×(1 2009
-1 2001
)-2009×(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