问题 解答题
4
7
×
5
6
+
1
6
×
4
7
4
5
-
4
5
÷4
13×(
2
13
+
2
11
)×11
3
8
+
1
27
)×16+
11
27
8
9
×
2
5
÷
8
15
2
3
+(
4
7
+
1
2
)×
7
25
8
13
÷7+
1
7
×
5
13
1
8
×58+
1
8
×41+
1
8
2
5
×
1
5
+40%×
4
5
5
9
÷5+5÷
5
9
答案

4
7
×
5
6
+
1
6
×
4
7

=

4
7
×(
5
6
+
1
6

=

4
7
×1,

=

4
7

②4÷

4
5
-
4
5
÷4,

=4×

5
4
-
4
5
×
1
4

=5-

1
5

=4

4
5

③13×(

2
13
+
2
11
)×11,

=( 13×

2
13
+13×
2
11
)×11,

=(2+

26
11
)×11,

=22+26,

=48;

④(

3
8
+
1
27
)×16+
11
27

=

3
8
×16+
16
27
+
11
27

=6+(

16
27
+
11
27
),

=6+1,

=7;

8
9
×
2
5
÷
8
15

=

8
9
×
2
5
×
15
8

=

2
3

2
3
+(
4
7
+
1
2
)×
7
25

=

2
3
+
4
7
×
7
25
+
1
2
×
7
25

=

2
3
+
4
25
+
7
50

=

2
3
+
3
10

=

29
30

8
13
÷7+
1
7
×
5
13

=(

8
13
+
5
13
)×
1
7

=1×

1
7

=

1
7

1
8
×58+
1
8
×
41+
1
8

=

1
8
×(58+41+1),

=

1
8
×100,

=12.5;

2
5
×
1
5
+40%×
4
5

=

2
5
×
1
5
+
2
5
×
4
5

=

2
5
×(
1
5
+
4
5
),

=

2
5

5
9
÷5+5÷
5
9

=

5
9
×
1
5
+5×
9
5

=

1
9

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