问题 解答题
计算下列各题,能简算的要简算.
5÷(
1
2
+
1
6
)×
2
15
1
2
-
1
3
+
1
4
)×48

6
25
÷9+
6
25
×
8
9
1
2
-
3
7
)×
7
25
+
2
5
答案

(1)5÷(

1
2
+
1
6
)×
2
15

=5×

2
15
÷(
1
2
+
1
6
),

=

2
3
÷(
1
2
+
1
6
),

=

2
3
×
6
4

=1;

(2)(

1
2
-
1
3
+
1
4
)×48

=

1
2
×48-
1
3
×48+
1
4
×48,

=24-16+12,

=20;

(3)

6
25
÷9+
6
25
×
8
9

=

6
25
×
1
9
+
6
25
×
8
9

=

6
25
×(
1
9
+
8
9
),

=

6
25
×1,

=

6
25

(4)(

1
2
-
3
7
)×
7
25
+
2
5

=

1
14
×
7
25
+
2
5

=

1
50
+
2
5

=

21
50

判断题
单项选择题