问题 解答题
下面各题,怎样算简便就怎样算.
11×
11
4
-11÷
4
7
5
2
×10×
8
5
4
9
÷(
5
6
-0.2)
2-
6
13
÷
9
26
-
2
3
答案

(1)11×

11
4
-11÷
4
7

=11×

11
4
-11×
7
4

=11×(

11
4
-
7
4
),

=11×1,

=11;

(2)

5
2
×10×
8
5

=(

5
2
×
8
5
)×10,

=4×10,

=40;

(3)

4
9
÷(
5
6
-0.2),

=

4
9
÷(
5
6
-
1
5
),

=

4
9
÷(
25
30
-
6
30
),

=

4
9
÷
19
30

=

4
9
×
30
19

=

40
57

(4)2-

6
13
÷
9
26
-
2
3

=2-

6
13
×
26
9
-
2
3

=2-

4
3
-
2
3

=2-(

4
3
+
2
3
),

=2-2,

=0.

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