问题 解答题
计算下面各题.
(1)10
3
4
-(
3
4
+3
2
5

(2)7.2÷4÷0.9
(3)
2
3
+8×(
7
8
-
5
6

(4)(
1
2
+
3
4
)÷
5
6
×
3
5
答案

(1)10

3
4
-(
3
4
+3
2
5
),

=10

3
4
-
3
4
-3
2
5

=10-3

2
5

=6

3
5

(2)7.2÷4÷0.9,

=7.2÷(4×0.9),

=7.2÷3.6,

=2;

(3)

2
3
+8×(
7
8
-
5
6
),

=

2
3
+8×
7
8
-8×
5
6

=

2
3
+7-
20
3

=7

2
3
-6
2
3

=1;

(4)(

1
2
+
3
4
)÷
5
6
×
3
5

=

5
4
÷
5
6
×
3
5

=

3
2
×
3
5

=

9
10

问答题
单项选择题