Subtraction One's Flashcards
1
Q
1-1
A
0
2
Q
2-1
A
1
3
Q
3-1
A
2
4
Q
4-1
A
3
5
Q
5-1
A
4
6
Q
6-1
A
5
7
Q
7-1
A
6
8
Q
8-1
A
7
9
Q
9-1
A
8
10
Q
10-1
A
9
11
Q
11-1
A
10
12
Q
12-1
A
11
