问题 解答题
能简算的要简算.
2
3
+(
4
7
+
1
2
)×
7
25
8
13
÷7+
1
7
×
5
13
7
4
÷(
2
3
+
1
2
)×
4
5
6
5
×
6
7
-
6
7
÷5
1
8
×58+
1
8
×41+
1
8
2
5
×
1
5
+40%×
4
5
答案

(1)

2
3
+(
4
7
+
1
2
)×
7
25

=

2
3
+
15
14
×
7
25

=

2
3
+
3
10

=

29
30

(2)

8
13
÷7+
1
7
×
5
13

=

8
13
×
1
7
+
1
7
×
5
13

=(

8
13
+
5
13
)×
1
7

=1×

1
7

=

1
7

(3)

7
4
÷(
2
3
+
1
2
)×
4
5

=

7
4
÷
7
6
×
4
5

=

7
4
×
6
7
×
4
5

=

6
5

(4)

6
5
×
6
7
-
6
7
÷5,

=

6
5
×
6
7
-
6
7
×
1
5

=(

6
5
-
1
5
)×
6
7

=1×

6
7

=

6
7

(5)

1
8
×58+
1
8
×41+
1
8

=

1
8
×(58+41+1),

=

1
8
×100,

=

25
2

(6)

2
5
×
1
5
+40%×
4
5

=

2
5
×
1
5
+
2
5
×
4
5

=

2
5
×(
1
5
+
4
5
),

=

2
5
×1,

=

2
5

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