题目内容

计算各题,能简便运算的写出主要过程.
36×(
1
4
+
1
6
+
1
9
)=
5
9
×7+
5
9
×11=
23-
8
9
×
3
4
÷
1
27
=
[1-(
1
4
+
3
8
)]÷
1
4
=
(1)36×(
1
4
+
1
6
+
1
9
),
=36×
1
4
+36×
1
6
+36×
1
9

=9+6+4,
=15+4,
=19;

(2)
5
9
×7+
5
9
×11,
=
5
9
×(7+11),
=
5
9
×18,
=10;

(3)23-
8
9
×
3
4
÷
1
27

=23-
2
3
÷
1
27

=23-18,
=5;

(4)[1-(
1
4
+
3
8
)]÷
1
4

=[1-
5
8
1
4

=
3
8
÷
1
4

=
3
2
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