题目内容

计算.
7
12
×0.625÷
15
16
(0.55-
2
5
)÷(
6
7
×
3
8
)
13
24
-
5
8
÷
25
18
×
4
9
(
4
5
+
1
4
)÷
7
3
+
8
15
.

(1)
7
12
×0.625÷
15
16
,
=
7
12
×
5
8
×
16
15
,
=
7
18
,

(2)(0.55-
2
5
)÷(
6
7
×
3
8
),
=(
11
20
-
2
5
)÷(
6
7
×
3
8
),
=
3
20
÷
9
28
,
=
3
20
×
28
9
,
=
7
15
,

(3)
13
24
-
5
8
÷
25
18
×
4
9
,
=
13
24
-
5
8
×
18
25
×
4
9
,
=
13
24
-
1
5
,
=
41
120
,

(4)(
4
5
+
1
4
)÷
7
3
+
8
15
,
=
21
20
÷
7
3
+
8
15
,
=
21
20
×
3
7
+
8
15
,
=
9
20
+
8
15
,
=
59
60
.
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