题目内容

口算：
3
4
+
1
2
=
1
3
-
1
4
=		 12×
3
4
=
1
5
÷3=		 20÷
4
9
=
5
7
÷1=
2
3
×
7
8
=
7
10
×
3
10
+
3
10
×
3
10
=
分析：根据分数加减乘除的计算方法进行计算．
7
10
×
3
10
+
3
10
×
3
10
根据乘法分配律进行简算．
解答：解：
3
4
+
1
2
=
5
4
1
3
-
1
4
=
1
12
 12×
3
4
=9
1
5
÷3=
1
15
 20÷
4
9
=45
5
7
÷1=
5
7
2
3
×
7
8
=
7
12
7
10
×
3
10
+
3
10
×
3
10
=
3
10
点评：口算时，注意运算符号和数据，然后再进一步计算．
练习册系列答案
相关题目
口算．
3
4
×
1
2
=
1
2
÷5=
1
5
-
1
5
=
4
7
×
3
4
=
7
3
÷7=		 3+
1
2
=
4
5
×
1
4
=
5
6
÷
10
13
=		 7-
1
3
=
口算．
3
4
÷2=		 8÷
4
5
=
4
7
÷
5
8
=		 44÷
22
23
=
7
16
÷
14
18
=		 10÷
9
10
=
5
12
×14=		 12÷
8
9
=
口算：
3
4
+
1
2
=
5
4
5
4
        
1
3
-
1
4
=
1
12
1
12
          12×
3
4
=
9
9
          
1
5
÷3=
1
15
1
15

20÷
4
9
=
45
45
       
5
7
÷1=
5
7
5
7
          
2
3
×
7
8
=
7
12
7
12
           
7
10
×
3
10
+
3
10
×
3
10
=
3
10
3
10

7
12
×
4
7
4
7
=
1
3
      
4
5
÷
3
5
3
5
=
4
3
．
口算．
2
5
+
1
2
=		 0.5×0.6÷0.5×0.6= 82= 0.9+0.01=
4.5-2.8-0.7=
1
4
÷0.75=		 1+6÷7= 2÷
3
4
=

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