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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