问题 解答题
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
答案

(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

填空题
问答题