题目内容

计算题
11
12
×
8
9
           
7
8
×
11
9
                     
3
4
×1
1
3
×
8
3
                
13×
9
13
                    
66
13
×12
6
5
×
2
15
               
2
15
÷
5
4
                     
9
10
÷
9
10
5
7
×
1
4
             
1
3
+
4
7
+
2
3
+
1
7
                  
4
5
×
3
8
×
5
9
101×
1
7
              
6
47
×48                      
1
7
×34×7
1
4
×
3
5
÷
9
8
          
3
5
÷
1
20
÷
3
4
                 
6
47
÷
5
6
5
8
÷(
1
2
+
1
4
)        
8
13
÷
6
13
                          
1
8
÷
5
12
考点:分数乘法,分数除法
专题:计算题
分析:根据四则运算的计算法则计算即可求解.注意
1
3
+
4
7
+
2
3
+
1
7
先计算同分母分数,
66
13
×12和
6
47
×48根据乘法分配律计算,
1
7
×34×7根据乘法交换律和结合律计算.
解答: 解:
11
12
×
8
9
=
22
27
           
7
8
×
11
9
=
77
72
                     
3
4
×1=
3
4
1
3
×
8
3
=
8
9
                
13×
9
13
=9                    
66
13
×12=60
12
13
6
5
×
2
15
=
4
25
               
2
15
÷
5
4
=
8
75
                     
9
10
÷
9
10
=1
5
7
×
1
4
=
5
28
             
1
3
+
4
7
+
2
3
+
1
7
=1
5
7
                  
4
5
×
3
8
×
5
9
=
1
6
101×
1
7
=14
3
7
              
6
47
×48=6
6
47
                      
1
7
×34×7=34
1
4
×
3
5
÷
9
8
=
2
15
          
  
3
5
÷
1
20
÷
3
4
=16                 
6
47
÷
5
6
=
36
235
5
8
÷(
1
2
+
1
4
)=
5
6
        
8
13
÷
6
13
=1
1
3
                    
1
8
÷
5
12
=
3
10
点评:考查了四则运算,关键是熟练掌握计算法则正确进行计算.
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