题目内容

计算下面各题(要写出计算过程)
4
5
+
1
4
)÷
7
3
+
7
10
2
3
+8×(
7
8
-
5
6
4
5
-
2
3
)×
15
2
2
9
×
3
5
+
4
9
×
3
5
(1)(
4
5
+
1
4
÷
7
3
+
7
10

=
21
20
÷
7
3
+
7
10

=
9
20
+
7
10

=1
3
20


(2)
2
3
+8×(
7
8
-
5
6
),
=
2
3
+8×
1
24

=
2
3
+
1
3

=1;

(3)(
4
5
-
2
3
)×
15
2

=
2
15
×
15
2

=1;

(4)
2
9
×
3
5
+
4
9
×
3
5

=
2
15
+
4
15

=
2
5
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