问题 解答题
用简便方法计算.
(1)36×(
3
4
-
1
2
+
1
6
)

(2)2.05-
11
9
-
7
9
答案

(1)36×(

3
4
-
1
2
+
1
6
),

=36×

3
4
-36×
1
2
+36×
1
6

=27-18+6,

=9+6,

=15;

(2)2.05-

11
9
-
7
9

=2.05-(

11
9
+
7
9
),

=2.05-2,

=0.05.

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