题目内容

(1)14
3
17
-6.46-3.54=
(2)4.2÷1.5-1.5×0.6=(3)(4
5
6
-3
3
4
)÷(
3
14
+
2
7
)=
(4)51.6÷[(3
2
5
-1.25)×
4
5
]=
(5)(0.92+
2
25
)÷(4-2
7
9
)=
(6)(5
2
5
-1.8)÷[(1.15+
13
20
)×1
2
3
]=
(1)14
3
17
-6.46-3.54,
=14
3
17
-(6.46-3.54),
=14
3
17
-10,
=4
3
17


(2)4.2÷1.5-1.5×0.6,
=2.8-0.9,
=1.9;

(3)(4
5
6
-3
3
4
)÷(
3
14
+
2
7
),
=
13
12
÷
1
2

=
13
6


(4)51.6÷[(3
2
5
-1.25)×
4
5
],
=51.6÷[(3.4-1.25)×0.8],
=51.6÷[3.4×0.8-1.25×0.8],
=51.6÷[2.72-1],
=51.6÷1.72,
=30;

(5)(0.92+
2
25
)÷(4-2
7
9
),
=(
23
25
+
2
25
)÷(
36
9
-
25
9
),
=1÷
11
9

=
9
11


(6)(5
2
5
-1.8)÷[(1.15+
13
20
)×1
2
3
],
=(5
2
5
-1
4
5
)÷[(1
3
20
+
13
20
)×1
2
3
],
=3
3
5
÷[1
4
5
×1
2
3
],
=3
3
5
÷[
9
5
×
5
3
],
=
18
5
÷3,
=
6
5
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