Doubles 1
1+1 =
2
2+2 =
4
I know 2+2=4,
so 4-2=___
2
1+1=2,
so 1+2=
3
2+2=4,
so 2+3=
5
4+4=
8
3+3=
6
I know 3+3=6,
so 6-3=___
3
3+3=6,
so 3+4=
7
4+4=8,
so 4+5=
9
5+5=
10
6+6=
12
I know 5+5=10,
so 10-5=___
5
6+6=12,
so 6+7=
13
5+5=10,
so 5+6=
11
8+8=
16
7+7=
14
I know 7+7=14,
so 14-7=___
7
8+8=16,
so 8+9=
17
7+7=14,
so 7+8=
15
10+10=
20
9+9=
18
I know 9+9=18,
so 18-9=___
9
9+9=18,
so 9+10=
19
10+10=20,
so 10+11=
21