问题 解答题
计算下面各题,能简便运算的写出主要过程.
36×(
1
4
+
1
6
+
1
9
1
3
+
1
4
-
1
24
)×24
3
5
×
2
3
+
2
5
÷1
1
2
[1-(
1
4
+
3
8
)]÷
1
4
答案

(1)36×(

1
4
+
1
6
+
1
9
),

=36×

1
4
+36×
1
6
+36×
1
9

=9+6+4,

=19;

(2)(

1
3
+
1
4
-
1
24
)×24,

=

1
3
×24+
1
4
×24-
1
24
×24,

=8+6-1,

=13;

(3)

3
5
×
2
3
+
2
5
÷1
1
2

=

3
5
×
2
3
+
2
5
×
2
3

=(

3
5
+
2
5
)×
2
3

=1×

2
3

=

2
3

(4)[1-(

1
4
+
3
8
)]÷
1
4

=[1-

5
8
1
4

=

3
8
÷
1
4

=

3
2

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