题目内容

用你认为简便的方法计算.
5
8
+(
22
27
-
5
8
)
8
9
-
1
6
+
2
3
6
7
+
1
6
-(
3
8
-
1
7
)
1-
1
14
-
2
7
(
1
4
+
2
5
)×20
25÷2
1
2
÷12.
①
5
8
+(
22
27
-
5
8
),
=
5
8
-
5
8
+
22
27
,
=
22
27
;

②
8
9
-
1
6
+
2
3
,
=
8
9
+
2
3
-
1
6
,
=
4
3
-
1
6
,
=
7
6
;

③
6
7
+
1
6
-(
3
8
-
1
7
),
=
6
7
+
1
6
-
3
8
+
1
7
,
=(
6
7
+
1
7
)+
1
6
-
3
8
,
=1+
1
6
-
3
8
,
=
19
24
;

④1-
1
14
-
2
7
,
=1-(
1
14
+
2
7
),
=1-
5
14
,
=
9
14
;

⑤(
1
4
+
2
5
)×20,
=
1
4
×20+
2
5
×20,
=5+8,
=13;

⑥25÷2
1
2
÷12,
=25×
2
5
×
1
12
,
=
5
6
.
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