Doubles
7+7=
14
4+6=
10
6+7=
13
6-3=
3
4+ ? = 10
6
8+8=
16
8+2=
10
7+8=
15
10-6=
4
5 + ? = 12
7
9+9=
18
11+8=
19
9+10=
19
9-4=
5
7 + ? = 15
8
11+11=
22
12+9=
21
10+11=
21
13-2=
11
10 + ? = 18
8
12+12=
24
11+14=
25
12+13=
25
22-4=
18
9 + ? = 18
9