题目内容

1
1
12
-
3
20
=
分析：先把带分数化成假分数，再通分计算．
解答：解：1
1
12
-
3
20

=
13
12
-
3
20

=
65
60
-
9
60

=
56
60

=
14
15
．
点评：本题考查了异分母分数减法的计算，注意正确的通分．
练习册系列答案
相关题目
用简便方法计算．
5-
3
7
-
4
7
1
6
+
3
8
+
5
8
5
9
-(
5
6
-
7
12
)
11
12
+
5
8
+
1
8
+
1
12
7
9
-（
1
3
+
4
9
）
3
20
+
8
15
+
17
20
．
计算下面各题．
7
9
-
3
9
=
7
8
-
6
8
=
5
6
-
4
6
=
11
12
-
6
12
=
14
20
-
3
20
=
11
15
-
4
15
=		 1-
3
8
=		 1-
1
7
=		 1-
4
5
=
直接写出得数．
1
4
+
3
4
=
5
6
-
1
6
=
2
5
+
9
10
=
3
20
-
1
50
=
10-
4
7
-
3
7
=
2
3
-
2
3
=		 3+
1
15
=		 1
1
6
+
1
3
=
5
7
+
11
12
+
2
7
．
口算
35+17= 11-0.6=
1
15
+
2
5
=
1
5
-
1
6
=
58-39= 32.8÷4=
7
8
-
1
8
=
3
20
÷
9
10
=
4.6+3.2= 2.5×40=
3
22
×
11
12
=
7
13
+
6
13
=
0.43×3= 0÷5.8= 9÷
1
9
=
7
15
÷1=

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