题目内容

计算下列各题,怎样简便就怎样算.
1
2
+
1
3
-
1
4
       
3
7
+
3
8
+
4
7
+
1
8
           
5
9
+(
5
6
-
1
2
)
9
7
-
5
8
-
3
8
               
5
7
+
2
3
-
9
14
               
3
4
+
2
5
+
5
4
+
3
5
.

(1)
1
2
+
1
3
-
1
4
,
=
5
6
-
1
4
,
=
7
12
;

(2)
3
7
+
3
8
+
4
7
+
1
8
,
=(
3
7
+
4
7
)+(
3
8
+
1
8
),
=1+
1
2
,
=1
1
2
;

(3)
5
9
+(
5
6
-
1
2
),
=
5
9
+
1
3
,
=
8
9
;

(4)
9
7
-
5
8
-
3
8
,
=
9
7
-(
5
8
+
3
8
),
=
9
7
-1,
=
2
7
;

(5)
5
7
+
2
3
-
9
14
,
=
29
21
-
9
14
,
=
31
42
;

(6)
3
4
+
2
5
+
5
4
+
3
5
,
=(
3
4
+
5
4
)+(
2
5
+
3
5
),
=2+1,
=3.
练习册系列答案
相关题目

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网