问题 解答题
能简算的用简算.
25%×
11
23
×4
12.9×60%+87.1×
3
5
101×
2
25
-
2
25
1.4-(1.5-80%×
5
8
答案

(1)25%×

11
23
×4,

=(0.25×4)×

11
23

=1×

11
23

=

11
23

(2)12.9×60%+87.1×

3
5

=12.9×

3
5
+87.1×
3
5

=(12.9+87.1)×

3
5

=100×

3
5

=60;

(3)101×

2
25
-
2
25

=(101-1)×

2
25

=100×

2
25

=8;

(4)1.4-(1.5-80%×

5
8
),

=1.4-(1.5-

4
5
×
5
8
),

=1.4-1,

=0.4.

单项选择题
单项选择题