题目内容

简便算(写出简算过程)
4
9
-
1
4
+
1
6
)×36
8.5+8.5×99
2012×
2010
2011
(1)(
4
9
-
1
4
+
1
6
)×36,
=
4
9
×
36-
1
4
×
36+
1
6
×
36,
=16-9+6,
=13;

(2)8.5+8.5×99,
=8.5×(1+99),
=8.5×100,
=850;

(3)2012×
2010
2011

=(2011+1)×
2010
2011

=2011×
2010
2011
+
2010
2011

=2010+
2010
2011

=2010
2010
2011
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