题目内容

能简算的要简算:
(1)(25×4-12.5)×8
(2)
8
20
÷6+
1
6
×
2
20

(3)
5
6
×0.75+
3
4
×
1
6

(4)4-[3.75×(1.2-
1
3
)+
3
4
].
(1))(25×4-12.5)×8,
=(100-12.5)×8,
=100×8-12.5×8,
=800-100,
=700;

(2)
8
20
÷6+
1
6
×
2
20

=(
8
20
+
2
20
)×
1
6

=
1
2
×
1
6

=
1
12


(3)
5
6
×0.75+
3
4
×
1
6

=0.75×(
5
6
+
1
6
),
=0.75×1,
=0.75;

(4)4-[3.75×(1.2-
1
3
)+
3
4
],
=4-[3.75×
13
15
+
3
4
],
=4-[3.25+
3
4
],
=4-4,
=0.
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