题目内容

能简算的要简算:
9.4×
1
4
+0.25×
3
5
1
6
÷[1÷(
3
5
-
3
10
)]
7
10
+
5
6
-
4
5
)×30×2
3
14
×(
3
4
-
1
10
÷2)
(1)9.4×
1
4
+0.25×
3
5

=9.4×0.25+0.25×0.6,
=(9.4+0.6)×0.25,
=10×0.25,
=2.5;

(2)
1
6
÷[1÷(
3
5
-
3
10
)],
=
1
6
÷[1÷
3
10
],
=
1
6
×
3
10

=
1
20


(3)(
7
10
+
5
6
-
4
5
)×30×2,
=(
7
10
+
5
6
-
4
5
)×60,
=
7
10
×60+
5
6
×60-
4
5
×60,
=42+50-48,
=92-48,
=44;

(4)
3
14
×(
3
4
-
1
10
÷2),
=
3
14
×(
3
4
-
1
20
),
=
3
14
×
14
20

=
3
20
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