问题 解答题
计算下面各题,能简算的要用简便方法算.
201-5406÷511.8×(21÷1.4)3-4×2.33×0.25
7
8
-
5
16
)×(
5
9
+
2
3
7
4
÷[
5
6
-(0.15+
9
20
)].
答案

(1)201-5406÷51,

=201-106,

=95;

(2)1.8×(21÷1.4),

=1.8×15,

=27;

(3)3-4×2.33×0.25,

=3-(4×0.25)×2.33,

=3-1×2.33,

=3-2.33,

=0.67;

(4)(

7
8
-
5
16
)×(
5
9
+
2
3
),

=

9
16
×
11
9

=

11
16

(5)

7
4
÷[
5
6
-(0.15+
9
20
)],

=

7
4
÷[
5
6
-0.6],

=

7
4
÷
7
30

=7.5.

单项选择题 B型题
单项选择题