问题 解答题
计算下面各题,能简算的要简算.
8
13
÷7+
1
7
×
6
13
11
13
÷[(
5
8
+
3
4
)÷
5
8
]
35
36
÷7×
4
15
÷
3
5
19
20
-(
3
5
+2×
1
8
答案

(1)

8
13
÷7+
1
7
×
6
13

=

8
13
×
1
7
+
1
7
×
6
13

=

1
7
×(
8
13
+
6
13
),

=

1
7
×
14
13

=

2
13

(2)

11
13
÷[(
5
8
+
3
4
)÷
5
8
],

=

11
13
÷[(
5
8
+
3
4
)×
8
5
],

=

11
13
÷[
5
8
×
8
5
+
3
4
×
8
5
],

=

11
13
÷[1+
6
5
],

=

11
13
×
5
11

=

5
13

(3)

35
36
÷7×
4
15
÷
3
5

=

35
36
×
1
7
×
4
15
×
5
3

=

5
36
×
4
15
×
5
3

=

1
27
×
5
3

=

5
81

(4)

19
20
-(
3
5
+2×
1
8
),

=

19
20
-(
3
5
+
1
4
),

=

19
20
-
17
20

=

1
10

单项选择题
单项选择题