问题 解答题
计算下列各题,能简算得要简算.
36×(
1
3
+
1
6
+
1
9
3
5
×
9
10
+
2
5
÷1
1
9
[1-(
1
4
+
3
8
)]÷
1
4
5
26
×25.
答案

(1)36×(

1
3
+
1
6
+
1
9
),

=36×

1
3
+36×
1
6
+36×
1
9

=12+6+4,

=18+4,

=22;

(2)

3
5
×
9
10
+
2
5
÷1
1
9

=(

3
5
+
2
5
)×
9
10

=1×

9
10

=

9
10

(3)[1-(

1
4
+
3
8
)]÷
1
4

=[1-

5
8
1
4

=

3
8
÷
1
4
,,

=1

1
2

(4)

5
26
×25,

=

5
26
×(26-1),

=

5
26
×26-
5
26
×
1,

=5-

5
26

=4

21
26

单项选择题
单项选择题