问题 解答题
下面各题怎样简便就怎样算
360÷15-2.5×1.4=
5
6
×
2
3
+
4
9
÷
1
6
=
0.16+4÷(
3
8
-
1
8
)=
3
7
-
2
5
+
4
7
-
3
5
=
答案

(1)360÷15-2.5×1.4,

=24-2.5×(1+0.4),

=24-2.5×1-2.5×0.4,

=24-2.5-1,

=21.5-1,

=20.5;

(2)

5
6
×
2
3
+
4
9
÷
1
6

=

5
9
+
4
9
×6,

=

5
9
+
24
9

=

29
9

(3)0.16+4÷(

3
8
-
1
8
),

=0.16+4÷

1
4

=0.16+16,

=16.16;

(4)

3
7
-
2
5
+
4
7
-
3
5

=(

3
7
+
4
7
)-(
2
5
+
3
5
),

=1-1,

=0.

单项选择题
单项选择题