题目内容

下面各题,怎样算简便就怎样算
2-
3
8
÷
7
16
-
1
7
5
9
×
5
6
-
4
9
÷
6
5
4÷
4
5
-
4
5
÷4
3
8
÷[(
1
2
-
1
3
)×
3
10
]
.

(1)2-
3
8
÷
7
16
-
1
7
,
=2-
6
7
-
1
7
,
=2-(
6
7
+
1
7
),
=2-1,
=1;

(2)
5
9
×
5
6
-
4
9
÷
6
5
,
=
5
9
×
5
6
-
4
9
×
5
6
,
=(
5
9
-
4
9
)×
5
6
,
=
1
9
×
5
6
,
=
5
54
;

(3)4÷
4
5
-
4
5
÷4,
=5-
1
5
,
=4
4
5
;

(4)
3
8
÷[(
1
2
-
1
3
)×
3
10
],
=
3
8
÷[
1
6
×
3
10
],
=
3
8
÷
1
20
,
=
15
2
.
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