题目内容

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
)].
(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.
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