Missing Subtrahend (1-9) Using Minuend (20-28) Flashcards
1
Q
20 - ___ = 19
20 = ___ + 19
A
= 1
2
Q
20 - ___ = 18
20 = ___ + 18
A
= 2
3
Q
20 - ___ = 17
20 = ___ + 17
A
= 3
4
Q
20 - ___ = 16
20 = ___ + 16
A
= 4
5
Q
20 - ___ = 15
20 = ___ + 15
A
= 5
6
Q
20 - ___ = 14
20 = ___ + 14
A
= 6
7
Q
20 - ___ = 13
20 = ___ + 13
A
= 7
8
Q
20 - ___ = 12
20 = ___ + 12
A
= 8
9
Q
20 - ___ = 11
20 = ___ + 11
A
= 9
10
Q
21 - ___ = 19
21 = ___ + 19
A
= 2
11
Q
21 - ___ = 18
21 = ___ + 18
A
= 3
12
Q
21 - ___ = 17
21 = ___ + 17
A
= 4
13
Q
21 - ___ = 16
21 = ___ + 16
A
= 5
14
Q
21 - ___ = 15
21 = ___ + 15
A
= 6
15
Q
21 - ___ = 14
21 = ___ + 14
A
= 7
16
Q
21 - ___ = 13
21 = ___ + 13
A
= 8
17
Q
21 - ___ = 12
21 = ___ + 12
A
= 9
18
Q
22 - ___ = 19
22 = ___ + 19
A
= 3
