问题 解答题
计算下列各式:
(1)
8
9
×[
3
4
-(
7
16
-0.25)]

(2)6
2
7
-2
2
3
×1
4
8
+3
1
3
÷
5
9

(3)[
1
3
+(
4
5
-
2
3
5
3
]÷
8
9

(4)(
5
12
-
5
16
4
5
+
2
3
-
3
4
答案

(1)

8
9
×[
3
4
-(
7
16
-0.25)],

=

8
9
×[
3
4
-
3
16
],

=

8
9
×
9
16

=

1
2

(2)6

2
7
-2
2
3
×1
4
8
+3
1
3
÷
5
9

=6

2
7
-4+6,

=2

2
7
+6,

=8

2
7

(3)[

1
3
+(
4
5
-
2
3
5
3
]÷
8
9

=[

1
3
+
2
15
×
5
3
]÷
8
9

=[

1
3
+
2
9
]÷
8
9

=

5
9
÷
8
9

=

5
8

(4)(

5
12
-
5
16
4
5
+
2
3
-
3
4

=

5
48
×
4
5
+
2
3
-
3
4

=

1
12
+
2
3
-
3
4

=

3
4
-
3
4

=0.

问答题 简答题
单项选择题 A1型题