问题 解答题
下面各题,怎样简算就怎样算.
(1)0.25-
11
15
+
3
4
-
4
15

 (2)6-
5
12
÷
10
9
-
13
8

 (3)
1
5
+
4
5
÷
16
75
×
8
25

 (4)(
5
7
-
1
14
+
5
6
5
42
答案

(1)0.25-

11
15
+
3
4
-
4
15

=

1
4
+
3
4
-(
11
15
+
4
15
),

=1-1,

=0;

(2)6-

5
12
÷
10
9
-
13
8

=6-

3
8
-
13
8

=6-(

3
8
+
13
8
),

=6-2,

=4;

(3)

1
5
+
4
5
÷
16
75
×
8
25

=

1
5
+
4
5
÷
16
75
×
8
25

=

1
5
+
15
4
×
8
25

=

1
5
+
6
5

=1

2
5

(4)(

5
7
-
1
14
+
5
6
5
42

=(

5
7
-
1
14
+
5
6
)×
42
5

=

5
7
×
42
5
-
1
14
×
42
5
+
5
6
×
42
5

=6-

3
5
+7

=12

2
5

单项选择题
单项选择题