1桁同士の加算

(1)

 
＋
4
＝
12

(2)

9
＋
 
＝
15

(3)

 
＋
9
＝
13

(4)

 
＋
3
＝
11

(5)

8
＋
 
＝
17

(6)

 
＋
8
＝
13

(7)

 
＋
9
＝
10

(8)

 
＋
6
＝
10

(9)

7
＋
 
＝
10

(10)

 
＋
7
＝
12

(11)

 
＋
5
＝
12

(12)

6
＋
 
＝
11

(13)

8
＋
 
＝
15

(14)

 
＋
4
＝
10

(15)

 
＋
6
＝
12

(16)

 
＋
9
＝
11