问题 解答题
计算下列各题,要写出主要计算过程,能用简便方法的要用简便方法计算.
①840÷24+25
②14.4÷8÷0.125③26.5÷(1.65+0.85)
7
8
-
5
12
+
1
6
48×(
11
12
-
3
4
+
1
6
)
1
5
÷[1-(
1
5
+
1
7
)].
答案

①840÷24+25

=35+25,

=60;

②14.4÷8÷0.125

=14.4÷(8×0.125),

=14.4÷1,

=14.4;

③26.5÷(1.65+0.85)

=26.5÷2.5,

=10.6;

7
8
-
5
12
+
1
6

=

11
24
+
1
6

=

5
8

48×(

11
12
-
3
4
+
1
6
)

=48×

11
12
-48×
3
4
+48×
1
6

=44-36+8,

=16;

1
5
÷[1-(
1
5
+
1
7
)].

=

1
5
÷[1-
12
35
],

=

1
5
÷
23
35

=

7
23

解答题
单项选择题