Subraction 0-20 > 0-20 > Flashcards
1-0
1
2-0
2
3-0
3
4-0
4
5-0
5
6-0
6
7-0
7
8-0
8
9-0
9
10-0
10
11-0
11
12-0
12
13-0
13
14-0
14
15-0
15
16-0
16
17-0
17
18-0
18
19-0
19
20-0
20
1-1
0
2-1
3-1
5-1