问题 解答题
怎样简便怎样算.
4
3
×(
5
6
-
3
4
)+
2
5

4
15
÷(
13
9
-
2
3
×
5
6

5
9
+
7
12
-
11
18
)×36
3
8
-25%)÷
5
4
×
5
2
答案

(1)

4
3
×(
5
6
-
3
4
)+
2
5

=

4
3
×
5
6
-
4
3
×
3
4
+
2
5

=

10
9
-1+
2
5

=

1
9
+
2
5

=

23
45

(2)

4
15
÷(
13
9
-
2
3
×
5
6
),

=

4
15
÷(
13
9
-
5
9
),

=

4
15
÷
8
9

=

3
10

(3)(

5
9
+
7
12
-
11
18
)×36,

=

5
9
×36+
7
12
×36-
11
18
×36,

=20+21-22,

=41-22,

=19;

(4)(

3
8
-25%)÷
5
4
×
5
2

=

1
8
×
4
5
×
5
2

=

1
10
×
5
2

=

1
4

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