4
2
1
2
3
3
4
1
6
7
6+5 =11
10
6+4 +1=11
8
9
10 11 12 13 14
7
8
9
7+5 =12
10
7+3 +2 = 12
10
11
12
13
8+5 =13
10
8+2 +3 =13
14
15
8
9
10
9+5 =14
10
9+1 +4 =14
11
12
13
14
15
16
17
+ 7 =12
+ 9
+
=14
8 =13
+ 5
=10
+ 6
=11
+ 10
=15
7+5=
5+5=
10
11
12
13
14
6+5=
9+5=
8+5=