408×+712 查看更多

 

题目列表(包括答案和解析)

直接写得数.
3
4
×8
=
5
7
×14
=
7
12
×3
=
2
9
×15
=
2
15
=
36×
5
9
=
24×
5
12
=
100×
13
25
=
7
8
×5
=
1
6
×4
=
7
12
=
15×
2
15
=

查看答案和解析>>

(2012?重庆)
口算.
1
7
×
7
12
=
3
4
×
3
8
=
5
6
=
1
5
×
2
3
=
2
9
÷
1
3
=
2
5
÷10
=
1
4
÷
1
2
=
2
3
=
1
2
×9×
2
9
=
5
6
-
1
2
=
4
5
÷10
=
4
5
÷
4
3
=
7
12
×
4
7
=
7
8
+
1
4
=
1-
3
4
=
1
2
+
3
5
=
5
8
-
1
2
=
1
3
+
2
9
=
1
4
-
1
8
=
1
9
÷
2
3
=

查看答案和解析>>

比较大小.
1
6
8    
5
4
9    
1
9
×7
1
7
×9
7
12
÷10
1
25
4
5
×
4
5
4
5
×1
1
3
÷
1
2
1
3

查看答案和解析>>

(1)
1
2
+
1
3
=
5
6
5
6
    
1
3
+
1
4
=
7
12
7
12
  
1
4
+
1
5
=
9
20
9
20
        
1
5
+
1
6
=
11
30
11
30

1
6
+
1
7
=
13
42
13
42

(2)观察(1),你能有何发现?并用你的发现计算下面这道题:
5
6
-
7
12
+
9
20
-
11
30
+
13
42
+
15
56
+
17
72
-
19
90
=

查看答案和解析>>

8
15
÷4=
9
10
÷3=
5
7
÷2=
7
12
÷7=
5
21
÷10=
6
35
÷6=
5
8
÷4=
4
7
÷2=
6
7
÷3=

查看答案和解析>>


同步练习册答案