题目内容

(4
5
6
-3
3
4
)÷(
3
14
+
2
7
)
51.6÷[(3
2
5
-1.25)×
4
5
]
(0.92+
2
25
)÷(4-2
7
9
)
(5
2
5
-1.8)÷[(1.15+
13
20
)×1
2
3
]
(1)(4
5
6
-3
3
4
)÷(
3
14
+
2
7
),
=
13
12
÷
1
2

=
13
6


(2)51.6÷[(3
2
5
-1.25)×
4
5
],
=51.6÷[2.15×
4
5
],
=51.6÷1.72,
=30;

(3)(0.92+
2
25
)÷(4-2
7
9
),
=1÷
11
9

=
9
11


(4)(5
2
5
-1.8)÷[(1.15+
13
20
)×1
2
3
]

=3.6÷[1.8×
5
3
],
=3.6÷3,
=1.2.
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