问题 解答题
能简算的要简算
39.8÷2.5-
11
2
×3.6+5.5÷
5
18
-360%
2010×
2008
2009

17
13
-(
9
11
+
16
39
×
3
4

75÷[
1
2
×(
3
4
-
1
3
)]
6.75÷
5
12
+42.5×0.24.
答案

39.8÷2.5-

11
2
×3.6+5.5÷
5
18
-360%,

=15.92-5.5×3.6+5.5×3.6-3.6,

=15.92+(5.5×3.6-5.5×3.6)-3.6,

=15.92-3.6,

=12.32;

2010×

2008
2009

=(2009+1)×

2008
2009

=2009×

2008
2009
+1×
2008
2009

=2008+

2008
2009

=2008

2008
2009

17
13
-(
9
11
+
16
39
×
3
4
),

=

17
13
-(
9
11
+
4
13
),

=

17
13
-
4
13
-
9
11

=1-

9
11

=

2
11

6.75÷

5
12
+42.5×0.24,

=6.75×2.4+42.5×0.24,

=67.5×0.24+42.5×0.24,

=(67.5+42.5)×0.24,

=110×0.24,

=(100+10)×0.24,

=24+2.4,

=26.4.

单项选择题
单项选择题